Task: Question Answering
Input (English): Problem: the simple interest on a sum of money will be rs . 400 after 10 years . if the principal is trebled after 5 years what will be the total interest at the end of the tenth year ? 
Options: a ) 800 , b ) 3799 , c ) 1200 , d ) 2693 , e ) 1732
Output (English): a