Task: Question Answering
Input (English): Problem: a , b and c rent a pasture . if a puts 10 oxen for 7 months , b puts 12 oxen for 5 months and c puts 15 oxen for 3 months for grazing and the rent of the pasture is rs . 210 , then how much amount should c pay as his share of rent ? 
Options: a ) 54 , b ) 45 , c ) 25 , d ) 15 , e ) 55
Output (English): a