Find the C.I. on a sum of Rs.1600 for 9 months at 20% per annum, interest being compounded quarterly?	Choices:
A) 2522 B) 1758 C) 1578 D) 1289 E) 2689
A = 1600(21/20)3   = 2522   Answer: 1578
<result>C</result>
Find the C.I. on a sum of Rs.1600 for 9 months at 20% per annum, interest being compounded quarterly?