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

Ex Input:
Problem: the ratio between the number of passengers travelling by i and ii class between the two railway stations is 1 : 50 , whereas the ratio of i and ii class fares between the same stations is 3 : 1 . if on a particular day rs . 1,325 were collected from the passengers travelling between these stations , then what was the amount collected from the ii class passengers ? 
Options: a ) rs . 750 , b ) rs . 1000 , c ) rs . 850 , d ) rs . 1250 , e ) none of these

Ex Output:
d


Ex Input:
Problem: if m = 3 ^ n , what is the greatest value of n for which m is a factor of 28 ! 
Options: a ) 13 , b ) 10 , c ) 12 , d ) 14 , e ) 16

Ex Output:
a


Ex Input:
Problem: the ratio of spinsters to cats is 2 to 7 . if there are 40 more cats than spinsters , how many spinsters are there ? 
Options: a ) 14 , b ) 16 , c ) 18 , d ) 20 , e ) 22

Ex Output:

b