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: if a ( a - 2 ) = 2 and b ( b - 2 ) = 2 , where a ≠ b , then a + b = 
Options: a ) − 1 , b ) − 2 , c ) 4 , d ) 46 , e ) 48

Output: a


Input: Consider Input: Problem: 11 + 12 + 13 + . . . 51 + 52 = ? 
Options: a ) 1361 , b ) 1362 , c ) 1323 , d ) 1364 , e ) 1365

Output: c


Input: Consider Input: Problem: if 2 + 2 / x = 3 - 3 / x , then x = 
Options: a ) - 5 , b ) 2 / 3 , c ) 1 , d ) 3 / 2 , e ) 5


Output: e