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': 'Ectopia lentis is seen in all except ? \nSelect and explain. \nA. Marfan syndrome, B. EDS, C. Trauma, D. Osteogenesis imperfecta', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Osteogenesis imperfecta", 'role': 'assistant'}]