On a sum of money, the simple interest for 2 years is Rs. 326, while the compound interest is Rs. 340, the rate of interest being the same in both the cases. The rate of interest is	Select.
A) 15 %	B) 14.25 %	C) 8.58 %	D) 10.5 %	E) 11.5 %

Rationale: "explanation : the difference between compound interest and simple interest on rs . p for 2 years at r % per annum = ( r ã — si ) / ( 2 ã — 100 ) difference between the compound interest and simple interest = 340 - 326 = 14 ( r ã — si ) / ( 2 ã — 100 ) = 14 ( r ã — 326 ) / ( 2 ã — 100 ) = 14 r = 8.58 % answer : option c"
Answer: C