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: the difference of two numbers is 11 and one - fifth of their sum is 9 . find the numbers .
Options: a ) 28 and 17 , b ) 27 and 18 , c ) 25 and 15 , d ) 27 and 15 , e ) 25 and 18

Ex Output:
a

Ex Input:
Problem: a man has some hens and cows . if the number of heads be 60 and the number of feet equals 200 , then the number of hens will be :
Options: a ) 22 , b ) 25 , c ) 24 , d ) 20 , e ) 28

Ex Output:
d

Ex Input:
Problem: every year an amount increases by 1 / 8 th of itself . how much will it be after two years if its present value is rs . 1600 ?
Options: a ) 3000 , b ) 4200 , c ) 2025 , d ) 1205 , e ) 3251

Ex Output:
c