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: if the remainder is 15 when the integer n is divided by 28 , what is the remainder when 2 n is divided by 14 ? 
Options: a ) 0 , b ) 1 , c ) 2 , d ) 3 , e ) 4
Example Output: c

Example Input: Problem: in a simultaneous throw of a pair of dice , find the probability of getting a total more than 9 
Options: a ) 1 / 2 , b ) 7 / 18 , c ) 5 / 13 , d ) 5 / 12 , e ) 6 / 17
Example Output: b

Example Input: Problem: xy = 1 then what is ( 4 ^ ( x + y ) ^ 2 ) / ( 4 ^ ( x - y ) ^ 2 ) 
Options: a ) 2 , b ) 4 , c ) 8 , d ) 256 , e ) 32
Example Output:
d