You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.

Question: On an order of 5 dozen boxes of a consumer product, a retailer receives an extra dozen free. This is equivalent to allowing him a discount of:

 Option A: 15%

 Option B: 16 1/6%

 Option C: 16 2/3%

 Option D: 20%

 Option E: 30%
Option C

Question: If x is 20 percent greater than 98, then x =

 Option A: 68

 Option B: 70.4

 Option C: 86

 Option D: 105.6

 Option E: 117.6
Option E

Question: Siddharth wants to borrow Rs.5000 at rate of interest 6% p.a. at S.I and lend the same amount at C.I at same rate of interest for two years. What would be his income in the above transaction?

 Option A: s.21.60

 Option B: s.21.29

 Option C: s.22.29

 Option D: s.18.00

 Option E: s.21.12

Option D