In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Example Input: Problem: the maximum number of student amoung them 1204 pens and 840 pencils can be distributed in such a way that each student gets the same number of pens and same number of pencils is : 
Options: a ) 91 , b ) 28 , c ) 56 , d ) 89 , e ) none of these
Example Output: b

Example Input: Problem: how many even number in the range between 8 to 100 inclusive are not divisible by 3 
Options: a ) 15 , b ) 30 , c ) 32 , d ) 33 , e ) 46
Example Output: c

Example Input: Problem: solve x 2 – 3 x – 4 = 0 . 
Options: a ) 1,4 , b ) - 1,4 , c ) 2,3 , d ) 2 , - 3 , e ) 3,4
Example Output:
b