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

Example input: Problem: in a throw of a coin find the probability of getting a tail ? 
Options: a ) 1 / 2 , b ) 1 / 3 , c ) 1 / 4 , d ) 2 / 5 , e ) 2 / 7
Example output: a
Example explanation: "s = { h , t } e = { t } p ( e ) = 1 / 2 answer is a"
Q: Problem: from a pack of 52 cards , two cards are drawn together at random . what is the probability of both the cards being kings ? 
Options: a ) 1 / 15 , b ) 25 / 57 , c ) 35 / 256 , d ) 1 / 221 , e ) 2 / 15
A:
d