Find the compound interest on Rs.16,000 at 20% per annum for 9 months, compounded quartely.	Choose the most appropriate option
A) rs . 2522	B) rs . 2512	C) rs . 2572	D) rs . 2592	E) none

Rationale: "solution principal = rs . 16,000 ; time = 9 months = 3 quarters ; amount = rs . [ 16000 x ( 1 + 5 / 100 ) ³ ] = [ 16000 x 21 / 20 x 21 / 20 x 21 / 20 ] = rs . 18522 . c . i = rs . ( 18522 - 16000 ) = rs . 2522 . answer a"
Answer: A