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: Surgery
[{'content': "Arachnodactyly/ spider fingers is seen in: March 2003 \nSelect and explain. \nA. Down's syndrome, B. Turner's syndrome, C. Marfan's syndrome, D. All of the above", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. C i.e. Marfan's syndrome", 'role': 'assistant'}]