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 number less than 4 when a die is rolled ? 
Options: a ) 5 / 5 , b ) 1 / 2 , c ) 5 / 1 , d ) 5 / 7 , e ) 5 / 2
Output:
b