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

Example Input: Problem: there are 8 students . 4 of them are men and 4 of them are women . if 4 students are selected from the 8 students . what is the probability that the number of men is equal to that of women ?
Options: a ) 18 / 35 , b ) 16 / 35 , c ) 14 / 35 , d ) 13 / 35 , e ) 12 / 35
Example Output: a

Example Input: Problem: if two dice are thrown together , the probability of getting an even number on one die and an odd number on the other is - .
Options: a ) 1 / 3 , b ) 1 / 2 , c ) 7 / 8 , d ) 3 / 4 , e ) 7 / 3
Example Output: b

Example Input: Problem: rhoda tosses a coin 5 times . find the probability of getting exactly 4 heads .
Options: a ) 5 / 32 , b ) 6 / 32 , c ) 5 / 16 , d ) 4 / 32 , e ) 8 / 32
Example Output:
a