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': 'Is the most common type of congenital cataract: \nSelect and explain. \nA. Lamellar cataract, B. Cataracta centralis pulverulenta, C. Coronary cataract, D. Coralliform cataract', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Lamellar cataract', 'role': 'assistant'}]