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

Ex Input:
Problem: the ratio of the number of females to males at a party was 1 : 2 but when 7 females and 7 males left , the ratio became 1 : 3 . how many people were at the party originally ? 
Options: a ) 28 , b ) 32 , c ) 36 , d ) 42 , e ) 50

Ex Output:
d


Ex Input:
Problem: in township k , 1 / 5 of the housing units are equipped with cable television . if 1 / 10 of the housing units , including 1 / 3 of those that are equipped with cable television , are equipped with videocassette recorders , what fraction of the housing units have neither cable television nor videocassette recorders ? 
Options: a ) 23 / 30 , b ) 11 / 15 , c ) 7 / 10 , d ) 1 / 6 , e ) 2 / 15

Ex Output:
a


Ex Input:
Problem: if 5 and 8 are factors of 60 n , what is the minimum value of n ? 
Options: a ) 2 , b ) 3 , c ) 7 , d ) 14 , e ) 56

Ex Output:

a