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: what least no . must be subtracted from 50248 so that remaining no . is divisible by 20 ? 
Options: a ) 3 , b ) 2 , c ) 4 , d ) 8 , e ) 6

Output: d


Input: Consider Input: Problem: find a sum for 1 st 7 prime number ' s ? 
Options: a ) 25 , b ) 28 , c ) 58 , d ) 34 , e ) 36

Output: c


Input: Consider Input: Problem: 8 x 1.6 - 3 x 1.4 / 1.3 = ? 
Options: a ) 21.5 , b ) 22 , c ) 15.8 , d ) 12.8 , e ) 25


Output: a