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 * b * c = ( √ ( a + 2 ) ( b + 3 ) ) / ( c + 1 ) , find the value of 6 * 15 * 3 . 
Options: a ) 8 , b ) 5 , c ) 11 , d ) 3 , e ) 4

Output: d


Input: Consider Input: Problem: if x is 20 percent more than y and y is 60 percent less than z , then x is what percent of z ? 
Options: a ) 500 % , b ) 48 % , c ) 500 / 3 % , d ) 125 % , e ) 60 %

Output: b


Input: Consider Input: Problem: sixty 5 percent of a number is 21 less than 4 fifth of that number . what is the number 
Options: a ) 140 , b ) 165 , c ) 150 , d ) 142 , e ) 174


Output: a