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

Ex Input:
Problem: in a college , the ratio of the number of boys to girls is 8 : 5 . if there are 300 girls , the total number of students in the college is 
Options: a ) 420 , b ) 520 , c ) 620 , d ) 780 , e ) 820

Ex Output:
d


Ex Input:
Problem: in a colony of 50 residents , the ratio of the number of men and women is 3 : 2 . among the women , the ratio of the educated to the uneducated is 1 : 3 . if the ratio of the number of education to uneducated persons is 4 : 6 , then find the ratio of the number of educated and uneducated men in the colony ? 
Options: a ) 1 : 1 , b ) 3 : 2 , c ) 1 : 3 , d ) 2 : 5 , e ) 5 : 7

Ex Output:
a


Ex Input:
Problem: two whole numbers whose sum is 72 can not be in the ratio 
Options: a ) 3 : 4 , b ) 3 : 5 , c ) 4 : 5 , d ) 5 : 7 , e ) none

Ex Output:

a