A. Rough
B. Smooth
C. Easy
D. None of these
🧠 Explanation:
- The word “hard” can describe something that is difficult to do or understand — in that sense, its opposite is “easy.”
- “Easy” implies something simple, effortless, or not requiring much effort, making it the correct antonym.
- This pair is commonly used in everyday language: e.g., “a hard question” vs. “an easy question.”
- The other options (rough, smooth) refer to texture, not difficulty, so they are contextually incorrect here.