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

Example Input: Problem: if x and y are sets of integers , x # y denotes the set of integers that belong to set x or set y , but not both . if x consists of 12 integers , y consists of 18 integers , and 6 of the integers are in both x and y , then x # y consists of how many integers ? 
Options: a ) 6 , b ) 16 , c ) 18 , d ) 30 , e ) 174
Example Output: c

Example Input: Problem: the simple form of the ratio 5 / 8 : 3 / 2 is ? 
Options: a ) 5 : 8 , b ) 5 : 5 , c ) 5 : 9 , d ) 5 : 3 , e ) 5 : 1
Example Output: a

Example Input: Problem: in a certain school , the ratio of boys to girls is 5 to 17 . if there are 72 more girls than boys , how many boys are there ? 
Options: a ) 27 , b ) 36 , c ) 45 , d ) 72 , e ) 108
Example Output:
e