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': 'The best dressing for open wounds is \nSelect and explain. \nA. Skin, B. Amnion, C. Opsite, D. Tulle grass', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]