Which form denotes the pupil?

• A. Cori
• B. Core
• C. Co
• D. Col

Answer: (B)

Think of the pupil as the central opening of the eye’s iris—the key feature you’re focusing on is its position at the center. The word that best conveys this central, essential part is core, since core means the center or heart of something. That central sense matches the pupil’s role, making core the most fitting form to denote the pupil. The other options don’t carry that same sense of centrality and aren’t standard ways to denote the pupil in this context.