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': 'Bilateral inferior lens subluxation is seen in? \nSelect and explain. \nA. Marfan syndrome, B. Homocysteinuria, C. Ocular trauma, D. None of the above', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is `b' i.e., Homocysteinuria", 'role': 'assistant'}]