Task: Question Answering
Input (English): Problem: a sum of money at simple interest amounts to rs . 1072 in 2 years and to rs . 1144 in 4 years . the sum is : 
Options: a ) rs . 1000 , b ) rs . 850 , c ) rs . 500 , d ) rs . 1200 , e ) rs . 900
Output (English): a