This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lens, Subject name: Ophthalmology
[{'content': "Typically bilateral inferior subluxations of the lens is seen in - \nSelect and explain. \nA. Marfan's syndrome, B. Homocystinuria, C. Hyperinsulinemia, D. Ocular trauma", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Homocystinuria: It is an autosomal recessive,inborn error of metabolism. In it the lens is usually subluxated downwards and nasally.', 'role': 'assistant'}]