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'.

Example Input: Problem: what is the remainder when 14,451 × 15,654 × 16,783 is divided by 5 ? 
Options: a ) 1 , b ) 3 , c ) 2 , d ) 4 , e ) 5
Example Output: c

Example Input: Problem: the greatest number which on dividing 1657 and 2037 leaves remainders 10 and 7 respectively , is : 
Options: a ) 123 , b ) 1 , c ) 235 , d ) 305 , e ) 505
Example Output: b

Example Input: Problem: evaluate : 37 - 18 ÷ 3 × 2 = 
Options: a ) 20 , b ) 25 , c ) 27 , d ) 22 , e ) 17
Example Output:
b