The difference between the compound interest compounded annually and simple interest for 2 years at 20% per annum is Rs.144. Find the principal?  Choose the correct choice from the following answers:
A) Rs.3000 B) Rs.3300 C) Rs.3600 D) Rs.3900 E) Rs.3800
P = 144(100/5)2 =&gt; P = 3600   ANSWER:Rs.3600
<result>C</result>
The difference between the compound interest compounded annually and simple interest for 2 years at 20% per annum is Rs.144. Find the principal?