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: two numbers are less than a third number by 40 % and 47 % respectively . how much per cent is the second number less than the first ?
Options: a ) 95 % , b ) 88 % , c ) 85 % , d ) 90 % , e ) none of these

Ex Output:
b

Ex Input:
Problem: if the sales tax reduced from 3 1 / 2 % to 3 1 / 3 % , then what difference does it make to a person who purchases an article with market price of rs . 10800 ?
Options: a ) 11 , b ) 13 , c ) 14 , d ) 18 , e ) 10

Ex Output:
d

Ex Input:
Problem: 15 people went to a hotel for combine dinner party 10 of them spent rs . 50 each on their dinner and rest spent 4 more than the average expenditure of all the 15 . what was the total money spent by them .
Options: a ) 1628.4 , b ) 1534 , c ) 780 , d ) 1496 , e ) none of these

Ex Output:
c