Task: Question Answering
Input (English): Problem: 4 milkmen rented a pasture . a grazed 24 cows for 3 months ; b 10 for 5 months ; c 35 cows for 4 months and d 21 cows for 3 months . if a ' s share of rent is rs . 1440 , find the total rent of the field . 
Options: a ) 6500 , b ) 3550 , c ) 4250 , d ) 2250 , e ) 3250
Output (English): a