Instructions: In this task, you need to provide the correct option for a given problem on probability from the provided options.
Input: Problem: what is the probability of getting a sum 9 from two throw of a dice ? 
Options: a ) 1 / 6 , b ) 1 / 8 , c ) 1 / 9 , d ) 1 / 12 , e ) 1 / 13
Output:
c