Task: Question Answering
Input (English): Problem: 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 ? 
Options: a ) 1750 , b ) 4000 , c ) 3500 , d ) 2000 , e ) 1000
Output (English): d