This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Ophthalmology
[{'content': "Not seen in keratoconus \nSelect and explain. \nA. More common in female, B. AD trait, C. Myopic with irregular astigmatism, D. Descemet's membrane may rupture", 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]