Instructions: In this task, you need to provide the correct option for a given problem on probability from the provided options.
Input: Problem: two unbiased coins are tossed . find the probability of getting two heads ? 
Options: a ) 1 / 2 , b ) 1 / 3 , c ) 1 / 4 , d ) 2 / 3 , e ) 3 / 5
Output:
c