3 cards are chosen at random from a standard 52-card deck. What is the probability that they form a pair? (A 3-card hand is a 'pair' if two of the cards match in rank but the third card is different. For example, 668 is a pair, but 999 is not.)
(A)\frac{1}{8} (B)\frac{1}{36} (C)\frac{1}{78} (D)\frac{72}{425}
D