What is the difference between the compound interest on Rs.12000 at 20% p.a. for one year when compounded yearly and half yearly?  Choose the correct choice from the following answers:
A) 399  B) 383  C) 120  D) 288  E) 133
When compounded annually, interest   = 12000[1 + 20/100]1 - 12000 = Rs.2400   When compounded semi-annually, interest   = 12000[1 + 10/100]2 - 12000 = Rs.2520   Required difference = 2520 - 2400 = Rs.120   Answer: 120
<result>C</result>
What is the difference between the compound interest on Rs.12000 at 20% p.a. for one year when compounded yearly and half yearly?