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

[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


[Q]: Problem: when two dice are tossed , what is the probability that the total score is a prime number ? 
Options: a ) 1 / 6 , b ) 3 , c ) 5 / 12 , d ) 7 / 12 , e ) 9 / 12
[A]: c


[Q]: Problem: in how many ways can 21 books on english and 19 books on french be placed in a row on a shelf so that two books on french may not be together ? 
Options: a ) 3990 , b ) 1540 , c ) 1995 , d ) 3672 , e ) none of these
[A]:
b