If A lends Rs. 3500 to B at 10% p.a. and B lends the same sum to C at 11.5% p.a., then the gain of B (in Rs.) in a period of 3 years is	Choose the correct choice from the following choices
A) rs . 154.50 B) rs . 155.50 C) rs . 156.50 D) rs . 157.50 E) none of these

Rationale: explanation : we need to calculate the profit of b . it will be , si on the rate b lends - si on the rate b gets gain of b = 3500 × 11.5 × 3 / 100 − 3500 × 10 × 3 / 100 = 157.50 option d
Answer: D