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': 'Compound fracture is \nSelect and explain. \nA. Fracture with aery involvement, B. Fracture with nerve involvement, C. Fracture with muscle involvement, D. Fracture with skin involvement', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Fracture with skin involvement', 'role': 'assistant'}]