What is the difference between the C.I. on Rs. 4000 for 1 1/2 years at 4% per annum compounded yearly and half-yearly?  Select:
A) s.2.04
B) s.2.08
C) s.1.63
D) s.2.83
E) s.2.42
C.I. when interest is compounded yearly   = [4000 * (1 + 4/100) * (1 + (1/2 * 4)/100]   = 4000 * 26/25 * 51/50 = Rs. 4243.2   C.I. when interest is compounded half-yearly   = [4000 * (1 + 2/100)2]   = (4000 * 51/50 * 51/50 * 51/50)   = Rs. 4244.83 Difference   = (4244.83 - 4243.2)   = Rs.1.63.   Answer: s.1.63
<result>C</result>
What is the difference between the C.I. on Rs. 4000 for 1 1/2 years at 4% per annum compounded yearly and half-yearly?