This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
[{'content': 'Equatorial diameter of the lens is – \nSelect and explain. \nA. 7min, B. 8 mm, C. 9mm, D. 10 mm', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Equatorial diameter of lens is 10 mm.', 'role': 'assistant'}]