A. Play: Cheat: Play and cheat are not directly opposite; they represent different concepts.
B. Lunch: Dinner: Lunch and dinner are meals but not opposites; they are sequential parts of a day.
C. Smile: Laugh: A smile can lead to a laugh, but they are not opposites.
D. Fresh: Stale: Fresh and stale are indeed opposites, as something that is fresh is new and unspoiled, while stale refers to something that has lost its freshness.The correct option is (D): Fresh : Stale