If difference between compound interest and simple interest on a sum at 10% P.a. for 2 years is Rs.65 then sum is	Choose the correct choice
A) s . 5000
B) s . 6500
C) s . 5800
D) s . 6000
E) s . 6200

Rationale: "p ( r / 100 ) ^ 2 = c . i - s . i p ( 10 / 100 ) ^ 2 = 65 6500 answer : b"
Answer: B