If A lends Rs.3500 to B at 10% per annum and B lends the same sum to C at 12% per annum then the gain of B in a period of 3 years is?	Choose the correct choice:
A) 200
B) 210
C) 220
D) 225
E) 230

Rationale: ( 3500 * 2 * 3 ) / 100 = > 210 answer : b
Answer: B