In this task, you need to provide the correct option for a given problem from the provided options.

Ex Input:
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

Ex Output:
c

Ex Input:
Problem: at present , the ratio between the ages of shekhar and shobha is 4 : 3 . after 6 years , shekhar ' s age will be 26 years . find out the age of shobha at present ?
Options: a ) 10 , b ) 12 , c ) 14 , d ) 15 , e ) 20

Ex Output:
d

Ex Input:
Problem: of 60 children , 30 are happy , 10 are sad , and 20 are neither happy nor sad . there are 17 boys and 43 girls . if there are 6 happy boys and 4 sad girls , how many boys are neither happy nor sad ?
Options: a ) 5 , b ) 4 , c ) 6 , d ) 8 , e ) 10

Ex Output:
a