Task: Question Answering
Input (English): Problem: if difference between compound interest and simple interest on a sum at 10 % p . a . for 2 years is rs . 51 then sum is 
Options: a ) rs . 5000 , b ) rs . 5100 , c ) rs . 5800 , d ) rs . 6000 , e ) rs . 6200
Output (English): b