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': 'Lens displacement in Marfan syndrome: \nSelect and explain. \nA. Upward & nasally, B. Downward & nasally, C. Upward & temporally, D. Downward & temporally', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C i.e. Upward & temporally', 'role': 'assistant'}]