A man took loan from a bank at the rate of 5% p.a. S.I. After 13 years he had to pay Rs. 1300 interest only for the period. The principal amount borrowed by him was? Pick
A) 1750  B) 4000  C) 3500  D) 2000  E) 1000

Rationale: "principal = ( 100 * 1300 ) / ( 5 * 13 ) = rs . 2000 answer : d"
Answer: D