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

Ex Input:
Problem: there are 15 balls in a jar . you take out 3 blue balls without putting them back inside , and now the probability of pulling out a blue ball is 1 / 3 . how many blue balls were there in the beginning ? 
Options: a ) 12 . , b ) 9 . , c ) 8 . , d ) 7 . , e ) 6 .

Ex Output:
d


Ex Input:
Problem: a card is drawn from a pack of 52 cards . the probability of getting a face card ? 
Options: a ) 2 / 15 , b ) 2 / 13 , c ) 1 / 15 , d ) 4 / 13 , e ) 5 / 7

Ex Output:
d


Ex Input:
Problem: when you draw 2 dices together , find the probability of getting a total of 6 ? 
Options: a ) 3 / 13 , b ) 2 / 31 , c ) 5 / 36 , d ) 7 / 41 , e ) 7 / 43

Ex Output:

c