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'.

Ex Input:
Problem: 10 is added to a certain number , the sum is multiplied by 2 , the product is divided by 2 and 2 is subtracted from the quotient . the remainder left is half of 88 . what is the number ? 
Options: a ) 21 , b ) 20 , c ) 25 , d ) 36 , e ) 45

Ex Output:
d


Ex Input:
Problem: how many even 4 - digit numbers can be formed , so that the numbers are divisible by 4 and no two digits are repeated ? 
Options: a ) 336 , b ) 784 , c ) 1120 , d ) 1804 , e ) 1936

Ex Output:
c


Ex Input:
Problem: a batsman scored 120 runs which included 5 boundaries and 8 sixes . what % of his total score did he make by running between the wickets 
Options: a ) 43.33 % , b ) 50 % , c ) 65 % , d ) 70 % , e ) 75 %

Ex Output:

a