If A lends Rs.3500 to B at 10% per annum and B lends the same sum to C at 14% per annum then the gain of B in a period of 3 years is? Choose the correct choice: A) 400 B) 410 C) 460 D) 420 E) 430

Rationale: "( 3500 * 4 * 3 ) / 100 = > 420 answer : d"
Answer: D