Task: Question Answering
Input (English): Problem: two equal sums of money were invested , one at 4 % and the other at 4.5 % . at the end of 7 years , the simple interest received from the latter exceeded to that received from the former by 31.50 . each sum was : 
Options: a ) 1200 , b ) 600 , c ) 750 , d ) 900 , e ) none of these
Output (English): d