If the simple interest on a sum of money for 2 years at 5% per annum is Rs.50, what will be the compound interest on same values  Options:
A) rs . 51.75  B) rs 51.50  C) rs 51.25  D) rs 51  E) none of these

Rationale: "explanation : s . i . = p ∗ r ∗ t / 100 p = 50 ∗ 100 / 5 ∗ 2 = 500 amount = 500 ( 1 + 5100 ) 2 500 ( 21 / 20 ∗ 21 / 20 ) = 551.25 c . i . = 551.25 − 500 = 51.25 option c"
Answer: C