Which of the following pairs of events are mutually exclusive?
(a) A golfer scoring the lowest 18-hole round in a 72-hole tournament and losing the tournament.
(b) A poker player getting a flush (all cards in the same suit) and 3 of a kind on the same 5-card hand.
(c) A mother giving birth to a baby girl and a set of twin daughters on the same day.
(d) A chess player losing the last game and winning the match.