If a card is drawn from a well shuffled pack of cards, the probability of drawing a spade or a king is -. Choose the most appropriate option
A) 2 / 10
B) 4 / 13
C) 3 / 5
D) 9 / 7
E) 1 / 4

Rationale: "explanation : p ( s ᴜ k ) = p ( s ) + p ( k ) - p ( s ∩ k ) , where s denotes spade and k denotes king . p ( s ᴜ k ) = 13 / 52 + 4 / 52 - 1 / 52 = 4 / 13 answer : b"
Answer: B