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

Input: Consider Input: Problem: how many of the positive factors of 25 , 15 and how many common factors are there in numbers ? 
Options: a ) 1 , b ) 2 , c ) 3 , d ) 4 , e ) 5

Output: b


Input: Consider Input: Problem: if 7 and 6 are factors of 60 n , what is the minimum value of n ? 
Options: a ) 2 , b ) 3 , c ) 7 , d ) 14 , e ) 56

Output: c


Input: Consider Input: Problem: the ratio of sum of squares of first n natural numbers to square of sum of first n natural numbers is 17 : 325 . the value of n is 
Options: ['a ) 15', 'b ) 25', 'c ) 35', 'd ) 30', 'e ) none of these']


Output: b