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'.

Input: Consider Input: Problem: find a sum for 1 st 7 prime number ' s ? 
Options: a ) 25 , b ) 28 , c ) 58 , d ) 34 , e ) 36

Output: c


Input: Consider Input: Problem: find ( 7 x + 2 y ) / ( x - 2 y ) if x / 2 y = 3 / 2 ? 
Options: a ) 23 , b ) 25 , c ) 26 , d ) 27 , e ) 29

Output: a


Input: Consider Input: Problem: if x / y = 3 and ( 2 a - x ) / ( 5 b - y ) = 3 , then the value of a / b is ? 
Options: a ) 15 / 2 , b ) - 2 , c ) 1 , d ) 2 , e ) 3


Output: a