Task: Question Answering
Input (English): Problem: man 1 alone can do a piece of work in 6 days and man 2 alone in 8 days . man 1 and man 2 undertook to do it for rs . 3200 . with the help of man 3 , they completed the work in 3 days . how much is to be paid to man 3 ? 
Options: a ) 400 , b ) 200 , c ) 100 , d ) 150 , e ) 500
Output (English): a