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': "Bennett's fracture is fracture dislocation of base of --- metacarpal: \nSelect and explain. \nA. 4th, B. 3rd, C. 2nd, D. 1st", 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. 1st', 'role': 'assistant'}]