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

Example Input: Problem: one lady has 2 children , one of her child is boy , what is the probability of having both are boys 
Options: a ) 1 / 2 , b ) 1 / 3 , c ) 1 / 4 , d ) 1 / 5 , e ) 3 / 4
Example Output: a

Example Input: Problem: a jar contains 20 red , 20 blue , 6 yellow and 4 pink balls . if two balls are to be selected at random and without replacement , approximately what is the probability both of them to be the same colour ? 
Options: a ) 1 / 25 , b ) 1 / 15 , c ) 1 / 3 , d ) 1 / 2 , e ) 1
Example Output: c

Example Input: Problem: if both 112 and 33 are factors of the number a * 43 * 62 * 1311 , then what is the smallest possible value of a ? 
Options: a ) 121 , b ) 3267 , c ) 363 , d ) 33 , e ) none of the above
Example Output:
c