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

Ex Input:
Problem: how many factors of 2475 are odd numbers greater than 1 ? 
Options: a ) 3 , b ) 4 , c ) 17 , d ) 6 , e ) 7

Ex Output:
c


Ex Input:
Problem: the marks obtained by polly and sandy are in the ratio 3 : 5 and those obtained by sandy and willy are in the ratio of 3 : 2 . the marks obtained by polly and willy are in the ratio of . . . ? 
Options: a ) 3 : 4 , b ) 5 : 6 , c ) 7 : 8 , d ) 9 : 10 , e ) 11 : 12

Ex Output:
d


Ex Input:
Problem: a certain university will select 1 of 6 candidates eligible to fill a position in the mathematics department and 2 of 10 candidates eligible to fill 2 identical positions in the computer science department . if none of the candidates is eligible for a position in both departments , how many different sets of 3 candidates are there to fill the 3 positions ? 
Options: a ) 42 , b ) 270 , c ) 140 , d ) 165 , e ) 315

Ex Output:

b