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 25 % of x is 30 less than 20 % of 1000 , then x is ? 
Options: a ) 188 , b ) 216 , c ) 156 , d ) 680 , e ) 121

Output: d


Input: Consider Input: Problem: for how many integer values of n will the value of the expression 4 n + 7 be an integer greater than 1 and less than 100 ? 
Options: a ) 30 , b ) 28 , c ) 27 , d ) 25 , e ) 26

Output: d


Input: Consider Input: Problem: evaluate ( 51 + 52 + 53 + . . . + 100 ) 
Options: a ) 3775 , b ) 3665 , c ) 3456 , d ) 3459 , e ) 3569


Output: a