Task: Question Answering
Input (English): Problem: the difference between compound interest and simple interest on a sum for 3 years at 10 % p . a . is rs . 124 find the sum . 
Options: a ) rs . 5000 , b ) rs . 4000 , c ) rs . 6000 , d ) rs . 8000 , e ) rs . 7000
Output (English): b