Which of the following describes antonyms?

• A. Big and small
• B. Aunt and uncle
• C. Blue and green
• D. Hot and cold

Answer: (A)

Antonyms are pairs of words that have opposite meanings. Big and small show this clearly because they describe opposite extents in size, and they can’t both apply to the same object in the same sense. The other options don’t form opposite meanings: aunt and uncle are family relations, blue and green are colors that aren’t opposites, and hot and cold are opposites too—but big and small is the most straightforward, commonly used example of antonyms in everyday language, which is why it’s the best fit here.