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

Ex Input:
Problem: a basket contains 6 apples , of which 1 is spoiled and the rest are good . if we select 2 apples from the basket simultaneously and at random , what is the probability that the 2 apples selected will include the spoiled apple ?
Options: a ) 1 / 2 , b ) 1 / 3 , c ) 1 / 4 , d ) 1 / 5 , e ) 1 / 6

Ex Output:
a

Ex Input:
Problem: how many different ways can 2 students be seated in a row of 7 desks , so that there is always at least one empty desk between the students ?
Options: a ) 2 , b ) 3 , c ) 30 , d ) 6 , e ) 12

Ex Output:
c

Ex Input:
Problem: on a windy day , out of every 3 sand dunes formed , only 1 remains . out of 5 blown - out sand - dunes , 1 has treasure and only 2 out of 3 sand dunes formed have lucky coupons . find the probability that the blown - out sand dune will contain both the things .
Options: a ) 2 / 25 , b ) 4 / 75 , c ) 7 / 75 , d ) 3 / 5 , e ) 4 / 45

Ex Output:
e