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: 5 / 4 of all married couples have more than one child . 2 / 5 of all married couples have more than 3 children . what fraction of all married couples have 2 or 3 children ? 
Options: a ) 1 / 5 , b ) 1 / 4 , c ) 17 / 20 , d ) 3 / 5 , e ) it can not be determined from the given information .
Example Output: c

Example Input: Problem: find out the square of a number which when doubled exceeds its one fifth by 9 ? 
Options: a ) 16 , b ) 25 , c ) 19 , d ) 26 , e ) 17
Example Output: b

Example Input: Problem: how many integers between 324,805 and 458,705 have tens digit 1 and units digit 3 ? 
Options: a ) 1,349 , b ) 1,353 , c ) 10,040 , d ) 1,354 , e ) 10,400
Example Output:
a