The difference between the compound interest compounded annually and simple interest for 2 years at 20% per annum is Rs.360. Find the principal?  Choose the correct choice from the following answers.
A) 2277
B) 2667
C) 9000
D) 2766
E) 1811

Rationale: "p = 360 ( 100 / 5 ) ^ 2 = > p = 9000 answer : c"
Answer: C