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: Radiology
[{'content': "Typically bilateral inferior lens subluxation of the lens is seen in: \nSelect and explain. \nA. Marfan's syndrome, B. Homocystinuria, C. Hyperlysinaemia, D. Ocular trauma", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Homocystinuria', 'role': 'assistant'}]