Task: Question Answering
Input (English): Problem: a fellow borrowed a certain sum of money at 8 % per annum at simple interest and in 8 years the interest amounted to rs . 900 less than the sum lent . what was the sum lent ? 
Options: a ) 1050 , b ) 1220 , c ) 2500 , d ) 1060 , e ) 1110
Output (English): c