What will be the difference between simple and compound interest at 10% per annum on a sum of Rs. 1000 after 4 years?  Choose the correct choice from the following choices.
A) Rs.64.17
B) Rs.64.22
C) Rs.64.12
D) Rs.64.10
E) Rs.64.16
S.I. = (1000 * 10 * 4)/100 = Rs. 400   C.I. = [1000 * (1 + 10/100)4 - 1000]   = Rs. 464.10 Difference = (464.10 - 400)   = Rs. 64.10   Answer:Rs.64.10
<result>D</result>
What will be the difference between simple and compound interest at 10% per annum on a sum of Rs. 1000 after 4 years?