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

Ex Input:
Problem: the ratio of toddlers to infants at a day care center is 7 to 3 . if 12 more infants join the day care to change the ratio to 7 to 5 , how many toddlers are there at this day care center ? 
Options: a ) 24 , b ) 36 , c ) 42 , d ) 72 , e ) 120

Ex Output:
c


Ex Input:
Problem: the sub - duplicate ratio of 25 : 16 is 
Options: a ) 4 : 3 , b ) 1 : 2 , c ) 1 : 3 , d ) 5 : 4 , e ) 2 : 3

Ex Output:
d


Ex Input:
Problem: in a college the ratio of the numbers of boys to the girls is 8 : 5 . if there are 175 girls , the total number of students in the college is ? 
Options: a ) 562 , b ) 356 , c ) 455 , d ) 416 , e ) 512

Ex Output:

c