Task: Question Answering
Input (English): Problem: raj invests a part of rs . 12000 in 12 % stock at rs . 120 and the remainder in 15 % stock at rs . 125 . if his total dividend per annum is rs . 1360 , how much does he invest in 12 % stock at rs . 120 ? 
Options: a ) 3000 , b ) 4000 , c ) 5000 , d ) 5500 , e ) 6000
Output (English): b