Task: Question Answering
Input (English): Problem: what is the compound interest on rs . 9500 at 6 % p . a . compounded half - yearly for 1 1 / 2 years . 
Options: a ) 810.91 , b ) 840.91 , c ) 880.91 , d ) 887.91 , e ) 980.91
Output (English): c