Task: Question Answering
Input (English): Problem: a person borrows 7000 for 3 years at 6 % p . a . simple interest . he immediately lends it to another person at 31 % p . a . for 3 years . find his gain in the transaction per year . 
Options: a ) 1600 , b ) 1700 , c ) 1550 , d ) 1650 , e ) 1750
Output (English): e