Task: Question Answering
Input (English): Problem: a , b , c can do a work in 15 , 20,45 days respectively . they get rs 500 for their work . what is the share of a ? 
Options: a ) rs . 240 , b ) rs . 340 , c ) rs . 260 , d ) rs . 280 , e ) rs . 440
Output (English): a