In this task, you need to provide the correct option for a given problem from the provided options.

Ex Input:
Problem: in a certain alphabet , 10 letters contain a dot and a straight line . 24 letters contain a straight line but do not contain a dot . if that alphabet has 40 letters , all of which contain either a dot or a straight line or both , how many letters contain a dot but do not contain a straight line ? 
Options: a ) 6 , b ) 8 , c ) 14 , d ) 20 , e ) 28

Ex Output:
a


Ex Input:
Problem: in a class , 9 students like to play basketball and 8 like to play cricket . 6 students like to play on both basketball and cricket . how many students like to play basketball or cricket or both ? 
Options: a ) 12 , b ) 11 , c ) 16 , d ) 18 , e ) 22

Ex Output:
b


Ex Input:
Problem: the cost of 3 pens and 5 pencils is rs . 340 . also the cost of one pen and one pencil is in the ratio of 4 : 1 respectively . what is the cost of one dozen pens ? 
Options: a ) rs . 960 , b ) rs . 250 , c ) rs . 300 , d ) rs . 150 , e ) none of these

Ex Output:

a