Task: Question Answering
Input (English): Problem: in x game of billiards , x can give y 20 points in 60 and he can give z 30 points in 60 . how many points can y give z in x game of 120 ? 
Options: a ) 30 , b ) 20 , c ) 25 , d ) 40 , e ) 50
Output (English): a