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: what is the value of 10 ^ 7 - 6 ^ 5 ? 
Options: a ) 99 , 91,223 , b ) 99 , 92,224 , c ) 99 , 94,265 , d ) 99 , 95,300 , e ) 99 , 96,307

Ex Output:
b


Ex Input:
Problem: if 5400 mn = k ^ 4 , where m , n , and k are positive integers , what is the least possible value of m + 2 n ? 
Options: a ) 11 , b ) 18 , c ) 20 , d ) 25 , e ) 40

Ex Output:
e


Ex Input:
Problem: 3 x ^ 2 - 6 x + 3 = 0 find the above equation find the value of x 
Options: a ) 0 , b ) 1 , c ) 2 , d ) 4 , e ) 6

Ex Output:

b