Consider a lady took a loan from a bank at the rate of 12% p.a. simple interest. After 3 years she had to pay Rs. 9900 interest only for the period. The principal amount borrowed by her was Choose one:
A) rs . 2000
B) rs . 27500
C) rs . 15000
D) rs . 20000
E) none of these

Rationale: "explanation : principal = rs . ( 100 × 9900 / 12 × 3 ) = > rs . 27500 . answer : b"
Answer: B