Task: Question Answering
Input (English): Problem: among 200 students , 56 % study sociology , 44 % study mathematics and 40 % study biology . if 30 % of students study both mathematics and sociology , what is the largest possible number of students who study biology but do not study either mathematics or sociology ? 
Options: a ) 60 , b ) 90 , c ) 120 , d ) 172 , e ) 188
Output (English): a