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: if z is not equal to zero , and z = 6 zs − 9 s 2 − − − − − − − − √ z = 6 zs − 9 s 2 , then z equals : 
Options: a ) s , b ) 3 s , c ) 4 s , d ) - 3 s , e ) - 4 s

Ex Output:
b


Ex Input:
Problem: n is a whole number which when divided by 4 gives 3 as remainder . what will be the remainder when 2 n is divided by 4 ? 
Options: a ) 3 , b ) 2 , c ) 1 , d ) 0 , e ) 5

Ex Output:
b


Ex Input:
Problem: if 2464 / 1.12 = 2200 , then 246.4 / 11.2 is equal to ? 
Options: a ) 24 , b ) 23 , c ) 22 , d ) 21 , e ) 25

Ex Output:

c