Task: Question Answering
Input (English): Problem: adam borrowed some money at the rate of 6 % p . a . for the first two years , at the rate of 9 % p . a . for the next 3 years , and at the rate of 14 % p . a . for the period beyond 4 years . if he pays a total interest of 11900 at the end of 9 years , how much money did he borrow ? 
Options: a ) 10,526 , b ) 12,526 , c ) 14,000 , d ) 16,000 , e ) 16,536
Output (English): b