Task: Question Answering
Input (English): Problem: in a class total 34 students , 16 are have a brother , 15 are have sisters , 9 students do n ' t have either brothers or sisters . find the number of students having both brother and sisters . 
Options: a ) 4 , b ) 5 , c ) 6 , d ) 7 , e ) 8
Output (English): c