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': 'Open fracture is treated by \nSelect and explain. \nA. Tourniquet, B. Internal fixation, C. Debridement, D. External fixation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Debridement', 'role': 'assistant'}]