Exhibit 15.6

DEGOLYER AND MACNAUGHTON

5001 SPRING VALLEY ROAD

SUITE 800 EAST

DALLAS, TEXAS 75244

This is a digital
representation of a DeGolyer and MacNaughton report.

This file is intended to be a manifestation of certain data in the subject report and as
such are subject to the same conditions thereof. The information and data contained in this file may be subject to misinterpretation; therefore, the signed and bound copy of this report should be considered the only authoritative source of such
information.



LOGO



---

DEGOLYER AND
MACNAUGHTON

5001 SPRING VALLEY ROAD

SUITE 800 EAST

DALLAS, TEXAS 75244

APPRAISAL REPORT

as of

DECEMBER 8, 2011

on the

PROVED RESERVES

of

CERTAIN FIELDS

in

INDIA

owned by

CAIRN INDIA LIMITED

for

SESA STERLITE LTD.



---

DEGOLYER AND MACNAUGHTON



TABLE of CONTENTS



|                                |  |   |    |  |  |      |  | 
|------------------------------- |  | - | -- |  |  | ---- |  | 
|                                |  |   |    |  |  | Page | 
|                                | 
|FOREWORD                        |  |   | 1  | 
|                                | 
|Scope of Investigation          |  |   | 1  | 
|Authority
Source of Information |  |   | 3  | 
|                                |  | 3 |   
|                                | 
|DEFINITION of RESERVES          |  |   | 5  | 
|                                | 
|ESTIMATION of RESERVES          |  |   | 11 | 
|                                | 
|VALUATION of RESERVES           |  |   | 14 | 
|                                | 
|Discussion of Fiscal Terms      |  |   | 15 | 
|RJ-ON-90/1 PSC (Rajasthan)      |  |   | 15 | 
|CB/OS-2 PSC                     |  |   | 16 | 
|PKGM-1 License Area (Ravva)     |  |   | 16 | 
|                                | 
|SUMMARY and CONCLUSIONS         |  |   | 18 | 

TABLES



|                                                                                              
|----------------------------------------------------------------------------------------------
|Table 1  Gross Proved Reserves                                                               
|Table 2  Net Proved Reserves                                                                 
|Table 3  Standardized Measure of Discounted Future Net Cash Flows relating to Proved Reserves



---

DEGOLYER AND
MACNAUGHTON

5001 SPRING VALLEY ROAD

SUITE 800 EAST

DALLAS, TEXAS 75244

APPRAISAL REPORT

as of

DECEMBER 8, 2011

on the

PROVED RESERVES

of

CERTAIN FIELDS

in

INDIA

owned by

CAIRN INDIA LIMITED

for

SESA STERLITE LTD.

FOREWORD

Scope of
Investigation

This report presents an appraisal, as of December 8, 2011, of the estimates of the extent and value of
the proved crude oil, condensate, and sales-gas reserves of certain fields in India in which Cairn India Limited (Cairn) has represented that it owns an interest under the terms of various production sharing contracts (PSC) with the Government of
India (GOI). This report has been prepared at the request of Sesa Sterlite Ltd. Sesa Sterlite Ltd. has represented that it is the parent company and 58.9-percent owner of Cairn.

Estimates of proved reserves presented in this report have been prepared in compliance with the regulations promulgated by the United
States Securities and Exchange Commission (SEC). These reserves definitions are discussed in detail in the Definition of Reserves section of this report.

Reserves estimated in this report are expressed as gross and net reserves. Gross reserves are defined as the total estimated petroleum to be produced from these properties after December 8, 2011. Net
reserves are defined as that portion of the gross reserves attributable to the interests owned by Cairn after deducting all interests owned by others.



---

DEGOLYER AND MACNAUGHTON



Certain properties in which Cairn has
represented that it owns an interest are subject to the terms of various production sharing agreements. The terms of these agreements generally allow for working-interest participants to be reimbursed for portions of capital costs and operating
expenses and to share in the profits. The reimbursements and profit proceeds are converted to a barrel of oil equivalent or standard cubic foot of gas equivalent by dividing by product prices to estimate the entitlement reserves.

These entitlement reserves are equivalent in principle to net reserves and are used to calculate an equivalent net share,
termed an entitlement interest. In this report, Cairns net reserves or interest for certain properties subject to these agreements is the entitlement based on Cairns working interest.

The fields evaluated herein are located in the CB/OS-2 PSC (three fields), the RJ-ON-90/1 PSC (six fields), and the PKGM-1 License Area
(one field).

The CB-X, Gauri, and Lakshmi fields are located in the CB/OS-2 PSC, the Aishwariya, Bhagyam, Mangala,
Raagashwari (Shallow), Raagashwari Deep, and Saraswati fields are located in the RJ-ON-90/1 PSC, and the Ravva field is located in the PKGM-1 License Area.

The net entitlement interests for the properties evaluated in this report are calculated for each PSC and may change from year-to-year depending on changes to the estimated costs projected for each field,
the timing of production as well as price assumptions. Estimates of the entitlement interest for each PSC are as follows:



|                    |  |                         |       |  |              |  |       | 
|------------------- |  | ----------------------- | ----- |  | ------------ |  | ----- | 
|                    |  | Net EntitlementInterest |      
|Area                |  | Oil(Percent)            |       |  | Gas(Percent) | 
|                    |  |                        
|CB/OS-2 PSC         |  |                         | 27.44 |  |              |  | 27.95 | 
|RJ-ON-90/1 PSC      |  |                         | 43.97 |  |              |  | 0.00  | 
|PKGM-1 License Area |  |                         | 10.01 |  |              |  | 9.98  | 



2



---

DEGOLYER AND MACNAUGHTON



This report also presents values that were
estimated for proved reserves using prices and costs as of the date the estimate was made. In this report, the prices and costs are held constant for the lives of the properties. An explanation of the price and cost assumptions is included in the
Valuation of Reserves section of this report.

Values of the proved reserves in this report are expressed in terms of
estimated future net revenue and present worth. Future net revenue is calculated by deducting cash royalties, operating expenses, capital costs, production taxes, and host country income tax from the future gross revenue. Future gross revenue is
that revenue which will accrue to the appraised interests from the production and sale of the estimated net reserves attributable to Cairn. Operating expenses include field operating expenses, workover costs, compression costs, and all other direct
costs specified by Cairn. Present worth is defined as the future net revenue discounted at a specified arbitrary discount rate compounded monthly over the expected period of realization.

Estimates of oil, condensate, and sales-gas reserves and future net revenue should be regarded only as estimates that may change as
further production history and additional information become available. Not only are such reserves and revenue estimates based on that information which is currently available, but such estimates are also subject to the uncertainties inherent in the
application of judgmental factors in interpreting such information.

This report was prepared in June 2014; therefore,
certain events occurring before the preparation of this report but after the as-of date of December 8, 2011, which might affect reserves, prices, costs, and values used in the estimates presented herein, could not be taken into
account.

Authority

This report was authorized by Mr. Arun G. Kumar, Executive Vice President  Finance, Sesa Sterlite Ltd.

Source of Information

Information used in the preparation of this report
was obtained from Cairn. In the preparation of this report we have relied, without independent verification, upon



3



---

DEGOLYER AND MACNAUGHTON



information furnished by Cairn with respect to the properties to be evaluated, the production from such properties, current costs of operation and development, current prices for production,
agreements relating to current and future operations and sale of production, and various other information and data that were accepted as represented.



4



---

DEGOLYER AND MACNAUGHTON



DEFINITION of RESERVES

Petroleum reserves included in this report are classified as proved. Only proved reserves have been evaluated for this report. Reserves
classifications used in this report are in accordance with the reserves definitions of Rules 410(a) (1)(32) of Regulation SX of the SEC. Reserves are judged to be economically producible in future years from known reservoirs
under existing economic and operating conditions and assuming continuation of current regulatory practices using conventional production methods and equipment. In the analyses of production-decline curves, reserves were estimated only to the limit
of economic rates of production under existing economic and operating conditions using prices and costs consistent with the effective date of this report, including consideration of changes in existing prices provided only by contractual
arrangements but not including escalations based upon future conditions. The petroleum reserves are classified as follows:

Proved oil and gas reserves  Proved oil and gas reserves are those quantities of oil and gas, which, by analysis of
geoscience and engineering data, can be estimated with reasonable certainty to be economically producible  from a given date forward, from known reservoirs, and under existing economic conditions, operating methods, and government regulations
 prior to the time at which contracts providing the right to operate expire, unless evidence indicates that renewal is reasonably certain, regardless of whether deterministic or probabilistic methods are used for the estimation. The project to
extract the hydrocarbons must have commenced or the operator must be reasonably certain that it will commence the project within a reasonable time.

(i) The area of the reservoir considered as proved includes:

(A) The area
identified by drilling and limited by fluid contacts, if any, and (B) Adjacent undrilled portions of the reservoir that can, with reasonable certainty, be judged to be continuous with it and to contain economically producible oil or gas on the
basis of available geoscience and engineering data.

(ii) In the absence of data on fluid contacts, proved quantities in a
reservoir are limited by the lowest known hydrocarbons (LKH) as seen in a well penetration unless geoscience, engineering, or performance data and reliable technology establishes a lower contact with reasonable certainty.



5



---

DEGOLYER AND MACNAUGHTON



(iii) Where direct observation from well
penetrations has defined a highest known oil (HKO) elevation and the potential exists for an associated gas cap, proved oil reserves may be assigned in the structurally higher portions of the reservoir only if geoscience, engineering, or performance
data and reliable technology establish the higher contact with reasonable certainty.

(iv) Reserves which can be produced
economically through application of improved recovery techniques (including, but not limited to, fluid injection) are included in the proved classification when:

(A) Successful testing by a pilot project in an area of the reservoir with properties no more favorable than in the reservoir as a whole, the operation of an installed program in the reservoir or an
analogous reservoir, or other evidence using reliable technology establishes the reasonable certainty of the engineering analysis on which the project or program was based; and (B) The project has been approved for development by all necessary
parties and entities, including governmental entities.

(v) Existing economic conditions include prices and costs at which
economic producibility from a reservoir is to be determined. The price shall be the average price during the 12-month period prior to the ending date of the period covered by the report, determined as an unweighted arithmetic average of the
first-day-of-the-month price for each month within such period, unless prices are defined by contractual arrangements, excluding escalations based upon future conditions.



6



---

DEGOLYER AND MACNAUGHTON



Probable reserves  Probable reserves
are those additional reserves that are less certain to be recovered than proved reserves but which, together with proved reserves, are as likely as not to be recovered.

(i) When deterministic methods are used, it is as likely as not that actual remaining quantities recovered will exceed the sum of estimated proved plus probable reserves. When probabilistic methods are
used, there should be at least a 50% probability that the actual quantities recovered will equal or exceed the proved plus probable reserves estimates.

(ii) Probable reserves may be assigned to areas of a reservoir adjacent to proved reserves where data control or interpretations of available data are less certain, even if the interpreted reservoir
continuity of structure or productivity does not meet the reasonable certainty criterion. Probable reserves may be assigned to areas that are structurally higher than the proved area if these areas are in communication with the proved reservoir.

(iii) Probable reserves estimates also include potential incremental quantities associated with a greater percentage recovery
of the hydrocarbons in place than assumed for proved reserves.

(iv) See also guidelines in paragraphs (iv) and
(vi) of the definition of possible reserves.

Possible reserves  Possible reserves are those additional
reserves that are less certain to be recovered than probable reserves.

(i) When deterministic methods are used, the total
quantities ultimately recovered from a project have a low probability of exceeding proved plus probable plus possible reserves. When probabilistic methods are used, there should be at least a 10% probability that the total quantities ultimately
recovered will equal or exceed the proved plus probable plus possible reserves estimates.

(ii) Possible reserves may be
assigned to areas of a reservoir adjacent to probable reserves where data control and interpretations of available data are progressively less certain. Frequently, this will be in areas where geoscience and



7



---

DEGOLYER AND MACNAUGHTON



engineering data are unable to define clearly the area and vertical limits of commercial production from the reservoir by a defined project.

(iii) Possible reserves also include incremental quantities associated with a greater percentage recovery of the hydrocarbons in place
than the recovery quantities assumed for probable reserves.

(iv) The proved plus probable and proved plus probable plus
possible reserves estimates must be based on reasonable alternative technical and commercial interpretations within the reservoir or subject project that are clearly documented, including comparisons to results in successful similar projects.

(v) Possible reserves may be assigned where geoscience and engineering data identify directly adjacent portions of a reservoir
within the same accumulation that may be separated from proved areas by faults with displacement less than formation thickness or other geological discontinuities and that have not been penetrated by a wellbore, and the registrant believes that such
adjacent portions are in communication with the known (proved) reservoir. Possible reserves may be assigned to areas that are structurally higher or lower than the proved area if these areas are in communication with the proved reservoir.

(vi) Pursuant to paragraph (iii) of the proved oil and gas definition, where direct observation has defined a highest
known oil (HKO) elevation and the potential exists for an associated gas cap, proved oil reserves should be assigned in the structurally higher portions of the reservoir above the HKO only if the higher contact can be established with reasonable
certainty through reliable technology. Portions of the reservoir that do not meet this reasonable certainty criterion may be assigned as probable and possible oil or gas based on reservoir fluid properties and pressure gradient interpretations.



8



---

DEGOLYER AND MACNAUGHTON



Developed oil and gas reserves 
Developed oil and gas reserves are reserves of any category that can be expected to be recovered:

(i) Through existing wells
with existing equipment and operating methods or in which the cost of the required equipment is relatively minor compared to the cost of a new well; and

(ii) Through installed extraction equipment and infrastructure operational at the time of the reserves estimate if the extraction is by means not involving a well.

Undeveloped oil and gas reserves Undeveloped oil and gas reserves are reserves of any category that are expected to be
recovered from new wells on undrilled acreage, or from existing wells where a relatively major expenditure is required for recompletion.

(i) Reserves on undrilled acreage shall be limited to those directly offsetting development spacing areas that are reasonably certain of production when drilled, unless evidence using reliable technology
exists that establishes reasonable certainty of economic producibility at greater distances.

(ii) Undrilled locations can be
classified as having undeveloped reserves only if a development plan has been adopted indicating that they are scheduled to be drilled within five years, unless the specific circumstances justify a longer time.

(iii) Under no circumstances shall estimates for undeveloped reserves be attributable to any acreage for which an application of fluid
injection or other improved recovery technique is contemplated, unless such techniques have been proved effective by actual projects in the same reservoir or an analogous reservoir, as defined in [section 210.410 (a) Definitions], or by
other evidence using reliable technology establishing reasonable certainty.

The extent to which probable and possible
reserves ultimately may be recategorized as proved reserves is dependent upon



9



---

DEGOLYER AND MACNAUGHTON



future drilling, testing, and well performance. The degree of risk to be applied in evaluating probable and possible reserves is influenced by economic and technological factors as well as the
time element. No probable or possible reserves have been evaluated for this report.



10



---

DEGOLYER AND MACNAUGHTON



ESTIMATION of RESERVES

Estimates of reserves were prepared by the use of appropriate geologic, petroleum engineering, and evaluation principles and techniques
that are in accordance with practices generally recognized by the petroleum industry as presented in the publication of the Society of Petroleum Engineers entitled Standards Pertaining to the Estimating and Auditing of Oil and Gas Reserves
Information (Revision as of February 19, 2007). The method or combination of methods used in the analysis of each reservoir was tempered by experience with similar reservoirs, stage of development, quality and completeness of basic data,
and production history.

When applicable, the volumetric method was used to estimate the original oil in place (OOIP) and
original gas in place (OGIP). Structure maps and isopach maps were used to estimate reservoir volumes. Electrical logs, radioactivity logs, core analyses, and other available data were used to prepare these maps as well as to estimate representative
values for porosity and water saturation. When adequate data were available and when circumstances justified, material-balance and other engineering methods were used to estimate OOIP and OGIP.

For those reservoirs where the volumetric method was applied, estimates of ultimate recovery were obtained after applying recovery
factors to OOIP or OGIP. These recovery factors were based on consideration of the type of energy inherent in the reservoirs, analyses of the petroleum, the structural positions of the properties, and the production histories. When applicable,
material-balance and other engineering methods were used to estimate recovery factors. In such cases, an analysis of reservoir performance, including production rates, reservoir pressures, and gas-oil ratio (GOR) behavior, was used in the estimation
of reserves.

For depletion-type reservoirs or those whose performance disclosed a reliable decline in producing-rate trends
or other diagnostic characteristics, reserves were estimated by the application of appropriate decline curves or other performance relationships. In the analyses of production-decline curves, reserves were estimated only to the limits of economic
production based on current economic conditions.



11



---

DEGOLYER AND MACNAUGHTON



In certain cases, when the previously named
methods could not be used, reserves were estimated by analogy with similar wells or reservoirs for which more complete data were available.

Estimates of proved reserves contained herein are based on forecasts that terminate at the economic limit, as defined in the Definition of Reserves section of this report, or at the end of the concession
life, whichever occurs first.

Gas reserves estimated herein are expressed as sales gas at a temperature base of 60 degrees
Fahrenheit and a pressure base of 14.7 pounds per square inch absolute. Separator gas is defined as the total gas produced from the reservoir after deductions for normal field separation, but before fuel usage and flare losses. Sales gas is defined
as the separator gas to be delivered to a pipeline inlet after deductions for fuel usage and flare and the removal of nonhydrocarbon components to meet gas sales specifications. Estimates of fuel usage have been provided by Cairn.

The oil and condensate reserves estimated in this report are expressed in terms of 42 United States gallons per barrel. Crude oil
reserves are to be recovered by conventional field operations. Condensate reserves are to be recovered by normal field separation.

Data available through December 8, 2011, were used to prepare the estimates shown herein. Estimated gross oil, gas, and condensate production was deducted from gross ultimate recovery to arrive at
estimates of gross reserves shown herein.

The gross and net proved reserves evaluated herein are presented in Tables 1 and
2, respectively.



12



---

DEGOLYER AND MACNAUGHTON



The estimated gross and net proved developed,
proved undeveloped, and total proved oil and condensate and sales-gas reserves, as of December 8, 2011, of the properties evaluated herein are summarized as follows, expressed in millions of barrels (MMbbl) and billions of cubic feet (Bcf):



|                         |        |  |                    |  |        |                          |  |  |                |  |  |                          |      |  |                |  |       |       |  |  |       |  |  |       |      |  |     |  |      |       |  |  |        |  |  |  |        |  |  |  |       |  |  |  |       | 
|------------------------ | ------ |  | ------------------ |  | ------ | ------------------------ |  |  | -------------- |  |  | ------------------------ | ---- |  | -------------- |  | ----- | ----- |  |  | ----- |  |  | ----- | ---- |  | --- |  | ---- | ----- |  |  | ------ |  |  |  | ------ |  |  |  | ----- |  |  |  | ----- | 
|Proved Developed         |        |  | Proved Undeveloped |  |        | Total Proved             | 
|Oil andCondensate(MMbbl) |        |  | Sales Gas(Bcf)     |  |        | Oil
andCondensate(MMbbl) |  |  | Sales Gas(Bcf) |  |  | Oil andCondensate(MMbbl) |      |  | Sales Gas(Bcf) | 
|Gross                    |        |  | Net                |  |        | Gross                    |  |  | Net            |  |  | Gross                    |      |  | Net            |  |       | Gross |  |  | Net   |  |  | Gross |      |  | Net |  |      | Gross |  |  | Net    | 
|                         |        |  |                    |  |        |                          |  |  |                |  | 
|                         | 253.58 |  |                    |  | 100.67 |                          |  |  | 77.82          |  |  |                          | 9.14 |  |                |  | 66.74 |       |  |  | 29.42 |  |  |       | 5.42 |  |     |  | 1.59 |       |  |  | 320.32 |  |  |  | 130.09 |  |  |  | 83.24 |  |  |  | 10.73 | 

Note: Net reserves include the 41.1-percent minority share not owned by Sesa Sterlite Ltd.



13



---

DEGOLYER AND MACNAUGHTON



VALUATION of RESERVES

This report has been prepared using prices and costs and future price and cost assumptions specified by Cairn. Future prices were
estimated using guidelines established by the SEC and the Financial Accounting Standards Board (FASB).

All economic
information provided by Cairn has been expressed in United States dollars (U.S.$) or Indian rupees (Rs.), and all revenue estimates included herein are expressed in Rs. using an exchange rate of Rs. 46.54 per U.S.$1.00.

Revenue values in this report have been estimated for the properties using fiscal terms and economic parameters provided by Cairn. A
discussion of the fiscal terms and other economic parameters follows.

Oil and Condensate Prices

Cairn has represented that the oil and condensate prices were based on a 12-month average price, calculated as the unweighted average of
the first-day-of-the-month price for each month within the 12-month period prior to the end of the reporting period, unless prices are defined by contractual agreements. All oil and condensate estimated herein is sold under contractual agreements.
The volume-weighted average adjusted product price attributable to estimated proved reserves was U.S.$100.18 per barrel for crude oil and condensate, based on a 12-month average Brent reference price of U.S.$111.27 per barrel. Cairn supplied
differentials by field to the Brent reference price, and these prices were held constant for the lives of the properties.

Natural Gas Prices

Cairn has represented that the natural gas prices are defined by contractual agreements based on specific market conditions. The volume-weighted average adjusted product price attributable to estimated
proved reserves was U.S.$4.45 per thousand cubic feet. The average contract prices for each contract area were held constant for the lives of the properties.



14



---

DEGOLYER AND MACNAUGHTON



Operating Expenses and Capital Costs

Estimates of future operating expenses and capital costs were based on information provided by Cairn. This information
included historical costs as well as operating expense and capital cost estimates for future development. Estimates of future operating expenses and capital costs, either higher or lower than the Cairn development plan estimates, may have been made
in order to conform to the respective reserves cases.

Abandonment Costs

Abandonment cost estimates were provided by Cairn for each field or contract area and were included as capital costs through escrow
payments over the life of the remaining reserves.

All cost estimates were held constant for the life of the evaluation
(December 2011 terms).

Discussion of Fiscal Terms

RJ-ON-90/1 PSC (Rajasthan)

Cairn has represented that under the terms of
the PSC signed with the GOI, the Contractor (Cairn and its partners) has the right to recover costs and share in the profit proceeds with the GOI. The Licensee (ONGC) pays royalties of 20 percent on the wellhead value of oil and condensate sales and
10 percent on the wellhead value of gas sales. The Contractor is liable for a production tax (termed cess) of Rs. 4,551 per tonne of oil produced. Royalties and cess are considered allowable costs for cost recovery purposes. Profits
are shared based on a sliding scale tied to the ratio of cumulative revenues divided by cumulative investments (exploration and development). Income taxes are assessable at statutory rates for domestic and foreign companies (Cairns interests
are held by two entities: one domestic entity and one foreign entity).



15



---

DEGOLYER AND MACNAUGHTON



CB/OS-2 PSC

Cairn has represented that under the terms of the PSC signed with the GOI, the Contractor has the right to recover costs and share in the
profit proceeds with the GOI. The Contractor is not responsible for royalties or cess under the terms of this contract. Profits are shared based on a sliding scale tied to the after-tax rate of return. Income taxes are assessable at statutory rates
for domestic companies.

PKGM-1 License Area (Ravva)

Cairn has represented that under the terms of the PSC signed with the GOI, the Contractor has the right to recover costs and share in the profit proceeds with the GOI. The Contractor pays royalties of Rs.
900 per tonne on oil sales and 10 percent on the wellhead value of gas sales. The Contractor is also liable for a cess of Rs. 481 per tonne of oil produced. Royalties and cess are considered allowable costs for cost recovery purposes.
Profits are shared based on a sliding scale tied to the after-tax rate of return. Income taxes are assessable at statutory rates for domestic companies.

The estimated future net revenue and net present worth of the future net revenue at a discount rate of 10 percent to be derived from the proved developed and total proved net reserves evaluated herein, as
of December 8, 2011, are presented below in millions of Indian rupees (MM Rs.):



|                          |         |  |                                       |  |         |                           |  |  |                                       |  |  |  |         | 
|------------------------- | ------- |  | ------------------------------------- |  | ------- | ------------------------- |  |  | ------------------------------------- |  |  |  | ------- | 
|Proved Developed          |         |  | Total Proved                          | 
|Future NetRevenue(MM Rs.) |         |  | Net PresentWorth at10 Percent(MM Rs.) |  |         | Future NetRevenue(MM Rs.) |  |  | Net PresentWorth at10 Percent(MM Rs.) | 
|                          |         |  |                                      
|                          | 268,531 |  |                                       |  | 203,194 |                           |  |  | 317,148                               |  |  |  | 234,293 | 



|Note: | Values for net reserves include the 41.1-percent minority share not owned by Sesa Sterlite Ltd.
|----- | -----------------------------------------------------------------------------------------------

Standardized measure of discounted future net cash flows (SMV) relating to proved reserves, as of December 8, 2011, are shown in
Table 3. The SMV is the net present worth discounted at 10 percent.

In our opinion, the information relating to estimated
proved reserves, estimated future net revenue from proved reserves, and present worth of estimated future net revenue from proved reserves of oil, condensate, and gas contained in this report has been prepared in accordance with



16



---

DEGOLYER AND MACNAUGHTON



Paragraphs 932-235-50-4, 932-235-50-6 through 932-235-50-9, 932-235-50-30, and 932-235-50-31 of the Accounting Standards Update 932-235-50, Extractive Industries  Oil and Gas (Topic
932): Oil and Gas Reserve Estimation and Disclosures (January 2010) of the Financial Accounting Standards Board and Rules 410(a) (1)(32) of Regulation SX and Rules 302(b), 1201, 1202(a) (1), (2), (3), (4),
(8)(i), (ii), and (v)(x), and 1203(a) of Regulation SK of the Securities and Exchange Commission; provided, however, that estimates of proved developed and proved undeveloped reserves are not presented at the beginning of the year.

To the extent the above-enumerated rules, regulations, and statements require determinations of an accounting or legal
nature, we, as engineers, are necessarily unable to express an opinion as to whether the above-described information is in accordance therewith or sufficient therefor.



17



---

DEGOLYER AND MACNAUGHTON



SUMMARY and CONCLUSIONS

The estimated net proved developed, proved undeveloped, and total proved oil and condensate, sales-gas, and oil equivalent reserves, as
of December 8, 2011, of certain fields attributable to the interests of Cairn and located in India are summarized as follows, expressed in millions of barrels (MMbbl), billions of cubic feet (Bcf), and millions of barrels of oil equivalent
(MMboe):



|                   |  |                          |        |  |               |  |       |                      |  |  |        | 
|------------------ |  | ------------------------ | ------ |  | ------------- |  | ----- | -------------------- |  |  | ------ | 
|                   |  | Net Reserves             |       
|                   |  | Oil andCondensate(MMbbl) |        |  | SalesGas(Bcf) |  |       | OilEquivalent(MMboe) | 
|                   |  |                          |       
|Proved Developed   |  |                          | 100.67 |  |               |  | 9.14  |                      |  |  | 102.19 | 
|Proved Undeveloped |  |                          | 29.42  |  |               |  | 1.59  |                      |  |  | 29.69  | 
|                   |  |                          |        |  |               |  |       |                      |  |  |        | 
|                   |  |                          |       
|Total Proved       |  |                          | 130.09 |  |               |  | 10.73 |                      |  |  | 131.88 | 

Notes:



|1. | Sales gas is converted to oil equivalent using a factor of 6,000 cubic feet of gas per 1 barrel of oil equivalent.
|-- | ------------------------------------------------------------------------------------------------------------------

|2. | Net reserves include the 41.1-percent minority share not owned by Sesa Sterlite Ltd.
|-- | ------------------------------------------------------------------------------------

Estimates of the present worth derived from the proved developed and total proved reserves of Cairns net petroleum interests, as
of December 8, 2011, discounted at a rate of 10 percent and expressed in millions of Indian rupees (MM Rs.), are presented in the following table:



|                 |  |                                    |         | 
|---------------- |  | ---------------------------------- | ------- | 
|                 |  | Present Worth at10
Percent(MM Rs.) |        
|                 | 
|Proved Developed |  |                                    | 203,194 | 
|Total Proved     |  |                                    | 234,293 | 



|Note: | Values for net reserves include the 41.1-percent minority share not owned by Sesa Sterlite Ltd.
|----- | -----------------------------------------------------------------------------------------------

While the oil and gas industry may be subject to regulatory changes from time to time that could affect an industry participants
ability to recover its oil and gas reserves, we are not aware of any such governmental actions which would restrict the recovery of the December 8, 2011, estimated oil and gas reserves. The reserves estimated in this report can be produced
under current regulatory guidelines.



18



---

DEGOLYER AND MACNAUGHTON



DeGolyer and MacNaughton is an independent
petroleum engineering consulting firm that has been providing petroleum consulting services throughout the world since 1936. DeGolyer and MacNaughton does not have any financial interest, including stock ownership, in Sesa Sterlite Ltd. or Cairn.
Our fees were not contingent on the results of our evaluation. This report has been prepared at the request of Sesa Sterlite Ltd. DeGolyer and MacNaughton has used all assumptions, procedures, data, and methods that it considers necessary to prepare
this report.



Submitted,LOGODeGOLYER and MacNAUGHTONTexas Registered Engineering Firm F-716


SIGNED: June 12, 2014





LOGO





LOGOThomas C. Pence, P.E.Senior Vice PresidentDeGolyer and MacNaughton




19



---

| |  |                                                                                                                                                     |  |     
| |  | --------------------------------------------------------------------------------------------------------------------------------------------------- |  | ----
| |  | TABLE 1 GROSS PROVED RESERVES
as of
DECEMBER 8, 2011 for CERTAIN FIELDS
in
INDIA
with interests owned by CAIRN INDIA LIMITED for
SESA STERLITE LTD. |  | LOGO



|                      |  |                          |        |  |                    |  |       |                      |  |  |                          |  |  |               |       |  |                      |  |      |                          |  |  |               |  |  |                      |        |  |  |  |       |  |  |  |        | 
|--------------------- |  | ------------------------ | ------ |  | ------------------ |  | ----- | -------------------- |  |  | ------------------------ |  |  | ------------- | ----- |  | -------------------- |  | ---- | ------------------------ |  |  | ------------- |  |  | -------------------- | ------ |  |  |  | ----- |  |  |  | ------ | 
|                      |  | Gross Reserves           |       
|                      |  | Proved Developed         |        |  | Proved Undeveloped |  |       | Total Proved         | 
|Area Field            |  | Oil andCondensate(MMbbl) |        |  | SalesGas(Bcf)      |  |       | OilEquivalent(MMboe) |  |  | Oil andCondensate(MMbbl) |  |  | SalesGas(Bcf) |       |  | OilEquivalent(MMboe) |  |      | Oil andCondensate(MMbbl) |  |  | SalesGas(Bcf) |  |  | OilEquivalent(MMboe) |       
|                      |  |                          |        |  |                    |  |       |                      | 
|CB/OS-2 PSC           |  |                          |        |  |                    |  |       |                      |  |  |                          |  |  |               |       |  |                      |  |      |                          |  |  |               |  |  |                      |        |  |  |  |       |  |  |  |        | 
|CB-X                  |  |                          | 0.00   |  |                    |  | 0.00  |                      |  |  | 0.00                     |  |  |               | 0.00  |  |                      |  | 0.00 |                          |  |  | 0.00          |  |  |                      | 0.00   |  |  |  | 0.00  |  |  |  | 0.00   | 
|Guari                 |  |                          | 0.45   |  |                    |  | 4.57  |                      |  |  | 1.21                     |  |  |               | 0.00  |  |                      |  | 0.00 |                          |  |  | 0.00          |  |  |                      | 0.45   |  |  |  | 4.57  |  |  |  | 1.21   | 
|Lakshmi               |  |                          | 2.83   |  |                    |  | 3.50  |                      |  |  | 3.41                     |  |  |               | 4.52  |  |                      |  | 5.42 |                          |  |  | 5.43          |  |  |                      | 7.35   |  |  |  | 8.92  |  |  |  | 8.84   | 
|                      |  |                          |        |  |                    |  |       |                      |  |  |                          |  |  |               |       |  |                      |  |      |                          |  |  |               |  |  |                      |        |  |  |  |       |  |  |  |        | 
|                      |  |                          |        |  |                    |  |       |                      | 
|Total CB/OS-2 PSC     |  |                          | 3.28   |  |                    |  | 8.07  |                      |  |  | 4.62                     |  |  |               | 4.52  |  |                      |  | 5.42 |                          |  |  | 5.43          |  |  |                      | 7.80   |  |  |  | 13.49 |  |  |  | 10.05  | 
|                      |  |                          |        |  |                    |  |       |                      | 
|RJ-ON-90/1PSC         |  |                          |        |  |                    |  |       |                      |  |  |                          |  |  |               |       |  |                      |  |      |                          |  |  |               |  |  |                      |        |  |  |  |       |  |  |  |        | 
|Aishwariya            |  |                          | 0.00   |  |                    |  | 0.00  |                      |  |  | 0.00                     |  |  |               | 26.00 |  |                      |  | 0.00 |                          |  |  | 26.00         |  |  |                      | 26.00  |  |  |  | 0.00  |  |  |  | 26.00  | 
|Bhagyam               |  |                          | 13.76  |  |                    |  | 0.00  |                      |  |  | 13.76                    |  |  |               | 6.79  |  |                      |  | 0.00 |                          |  |  | 6.79          |  |  |                      | 20.55  |  |  |  | 0.00  |  |  |  | 20.55  | 
|Mangala               |  |                          | 206.80 |  |                    |  | 0.00  |                      |  |  | 206.80                   |  |  |               | 27.50 |  |                      |  | 0.00 |                          |  |  | 27.50         |  |  |                      | 234.30 |  |  |  | 0.00  |  |  |  | 234.30 | 
|Raagashwari (Shallow) |  |                          | 0.00   |  |                    |  | 0.00  |                      |  |  | 0.00                     |  |  |               | 1.72  |  |                      |  | 0.00 |                          |  |  | 1.72          |  |  |                      | 1.72   |  |  |  | 0.00  |  |  |  | 1.72   | 
|Raagashwari Deep      |  |                          | 1.33   |  |                    |  | 0.00  |                      |  |  | 1.33                     |  |  |               | 0.00  |  |                      |  | 0.00 |                          |  |  | 0.00          |  |  |                      | 1.33   |  |  |  | 0.00  |  |  |  | 1.33   | 
|Saraswati             |  |                          | 0.54   |  |                    |  | 0.00  |                      |  |  | 0.54                     |  |  |               | 0.21  |  |                      |  | 0.00 |                          |  |  | 0.21          |  |  |                      | 0.75   |  |  |  | 0.00  |  |  |  | 0.75   | 
|                      |  |                          |        |  |                    |  |       |                      |  |  |                          |  |  |               |       |  |                      |  |      |                          |  |  |               |  |  |                      |        |  |  |  |       |  |  |  |        | 
|                      |  |                          |        |  |                    |  |       |                      | 
|Total RJ-ON-90/1 PSC  |  |                          | 222.43 |  |                    |  | 0.00  |                      |  |  | 222.43                   |  |  |               | 62.22 |  |                      |  | 0.00 |                          |  |  | 62.22         |  |  |                      | 284.65 |  |  |  | 0.00  |  |  |  | 284.65 | 
|                      |  |                          |        |  |                    |  |       |                      | 
|PKGM-1 License Area   |  |                          |        |  |                    |  |       |                      |  |  |                          |  |  |               |       |  |                      |  |      |                          |  |  |               |  |  |                      |        |  |  |  |       |  |  |  |        | 
|Ravva                 |  |                          | 27.87  |  |                    |  | 69.75 |                      |  |  | 39.50                    |  |  |               | 0.00  |  |                      |  | 0.00 |                          |  |  | 0.00          |  |  |                      | 27.87  |  |  |  | 69.75 |  |  |  | 39.50  | 
|                      |  |                          |        |  |                    |  |       |                      | 
|Grand Total           |  |                          | 253.58 |  |                    |  | 77.82 |                      |  |  | 266.55                   |  |  |               | 66.74 |  |                      |  | 5.42 |                          |  |  | 67.65         |  |  |                      | 320.32 |  |  |  | 83.24 |  |  |  | 334.20 | 

Note: Sales gas is converted to oil equivalent using a factor of 6,000 cubic feet of gas per 1 barrel of oil equivalent.

These data accompany the report of DeGolyer and MacNaughton and are subject to its specific conditions.



---

| |  |                                                                                                                                                  |  |     
| |  | ------------------------------------------------------------------------------------------------------------------------------------------------ |  | ----
| |  | TABLE 2 NET PROVED RESERVES
as of
DECEMBER 8, 2011 for CERTAIN AREAS
in
INDIA
with interests owned by CAIRN INDIA LIMITED for
SESA STERLITE LTD. |  | LOGO



|                    |  |                          |        |  |                    |  |      |                      |  |  |                          |  |  |               |       |  |                      |  |      |                          |  |  |               |  |  |                      |        |  |  |  |       |  |  |  |        | 
|------------------- |  | ------------------------ | ------ |  | ------------------ |  | ---- | -------------------- |  |  | ------------------------ |  |  | ------------- | ----- |  | -------------------- |  | ---- | ------------------------ |  |  | ------------- |  |  | -------------------- | ------ |  |  |  | ----- |  |  |  | ------ | 
|                    |  | Net Reserves             |       
|                    |  | Proved Developed         |        |  | Proved Undeveloped |  |      | Total Proved         | 
|Area                |  | Oil andCondensate(MMbbl) |        |  | SalesGas(Bcf)      |  |      | OilEquivalent(MMboe) |  |  | Oil andCondensate(MMbbl) |  |  | SalesGas(Bcf) |       |  | OilEquivalent(MMboe) |  |      | Oil andCondensate(MMbbl) |  |  | SalesGas(Bcf) |  |  | OilEquivalent(MMboe) |       
|                    |  |                          |        |  |                    |  |      |                      | 
|CB/OS-2 PSC         |  |                          | 0.97   |  |                    |  | 2.18 |                      |  |  | 1.33                     |  |  |               | 1.17  |  |                      |  | 1.59 |                          |  |  | 1.44          |  |  |                      | 2.14   |  |  |  | 3.77  |  |  |  | 2.77   | 
|RJ-ON-90/1PSC       |  |                          | 96.91  |  |                    |  | 0.00 |                      |  |  | 96.91                    |  |  |               | 28.25 |  |                      |  | 0.00 |                          |  |  | 28.25         |  |  |                      | 125.16 |  |  |  | 0.00  |  |  |  | 125.16 | 
|PKGM-1 License Area |  |                          | 2.79   |  |                    |  | 6.96 |                      |  |  | 3.95                     |  |  |               | 0.00  |  |                      |  | 0.00 |                          |  |  | 0.00          |  |  |                      | 2.79   |  |  |  | 6.96  |  |  |  | 3.95   | 
|                    |  |                          |        |  |                    |  |      |                      |  |  |                          |  |  |               |       |  |                      |  |      |                          |  |  |               |  |  |                      |        |  |  |  |       |  |  |  |        | 
|                    |  |                          |        |  |                    |  |      |                      | 
|Total               |  |                          | 100.67 |  |                    |  | 9.14 |                      |  |  | 102.19                   |  |  |               | 29.42 |  |                      |  | 1.59 |                          |  |  | 29.69         |  |  |                      | 130.09 |  |  |  | 10.73 |  |  |  | 131.88 | 

Notes:



|1. | Sales gas is converted to oil equivalent using a factor of 6,000 cubic feet of gas per 1 barrel of oil equivalent.
|-- | ------------------------------------------------------------------------------------------------------------------

|2. | Net reserves include the 41.1-percent minority share not owned by Sesa Sterlite Ltd.
|-- | ------------------------------------------------------------------------------------

These data accompany the report of DeGolyer and MacNaughton and are subject to its specific conditions.



---

| |  |                                                                                                                                                                                                                        |  |     
| |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | ----
| |  | TABLE 3
STANDARDIZED MEASURE of DISCOUNTED FUTURE NET CASH FLOWS
relating to
PROVED RESERVES as of DECEMBER 8, 2011
for
CERTAIN PROPERTIES in INDIA
with interests owned by CAIRN INDIA LIMITED for
SESA STERLITE LTD. |  | LOGO



|                                                         |  |                     |         |  
|-------------------------------------------------------- |  | ------------------- | ------- | -
|                                                         |  | TotalProved(MM Rs.) |        
|                                                         | 
|Future cash inflows                                      |  |                     | 608,826 |  
|Future production costs                                  |  |                     | 179,365 |  
|Future development costs                                 |  |                     | 53,319  |  
|Future income tax expenses                               |  |                     | 58,993  |  
|Future net cash flows                                    |  |                     | 317,149 |  
|10% annual discount for estimated timing of cash flows   |  |                     | (82,856 | )
|                                                         | 
|Standardized measure of discounted future net cash flows |  |                     | 234,293 |  



|Note: | Values for proved net reserves include the 41.1-percent minority share not owned by Sesa Sterlite Ltd.
|----- | ------------------------------------------------------------------------------------------------------

These data accompany the report of DeGolyer and MacNaughton and are subject to its specific conditions.