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 17 are not factors of 34 ?
Options: a ) 0 , b ) 1 , c ) 2 , d ) 3 , e ) 4

Output: a

Input: Consider Input: Problem: in a class , 30 students pass in english and 20 students in math , while some students among these pass in both . how many more students do only english as compared to those doing only maths ?
Options: a ) 10 , b ) 15 , c ) 20 , d ) 25 , e ) indeterminate

Output: a

Input: Consider Input: Problem: how many factors does 16 ^ 2 have ?
Options: a ) 2 , b ) 8 , c ) 4 , d ) 25 , e ) 26
Output: c