If A lends Rs.2000 to B at 15% per annum and B lends the same sum to C at 17% per annum then the gain of B in a period of 4 years is?  Choose the correct choice from the following choices:
A) 155	B) 162	C) 157.5	D) 160	E) 157.12

Rationale: "( 2000 * 2 * 4 ) / 100 = > 160 answer : d"
Answer: D