Find compound interest on Rs. 7500 at 4% per year for 2 years, compounded annually.  Choose the correct choice from the following options.
A) 812  B) 712  C) 412  D) 512  E) 612

Rationale: "amount = rs [ 7500 * ( 1 + ( 4 / 100 ) 2 ] = rs ( 7500 * ( 26 / 25 ) * ( 26 / 25 ) ) = rs . 8112 . therefore , compound interest = rs . ( 8112 - 7500 ) = rs . 612 . answer is e ."
Answer: E