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

Ex Input:
Problem: if a coin is flipped , the probability that the coin will land heads is 1 / 2 . if the coin is flipped 6 times , what is the probability that it will land heads up on all 6 flips ? 
Options: a ) 1 / 6 , b ) 1 / 8 , c ) 1 / 32 , d ) 1 / 2 , e ) 1 / 64

Ex Output:
e


Ex Input:
Problem: in a throw of dice what is the probability of ge æ « ng number greater than 3 
Options: a ) 1 / 2 , b ) 1 / 3 , c ) 1 / 5 , d ) 1 / 6 , e ) none of these

Ex Output:
a


Ex Input:
Problem: in how many ways 2 boys and 2 girls can be seated in a row so that boys and girls are alternate ? 
Options: a ) 7 , b ) 8 , c ) 9 , d ) 10 , e ) 11

Ex Output:

b