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': 'Which of the following true about burns? \nSelect and explain. \nA. 4th degree burns should not be washed with water, B. Early skin grafting gives better results, C. Face burns should never be left open, D. Silver sulfadiazine is painful on application', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Burns always should be washed.\nFace burns can left open with Silver sulfadiazine application.\nMafenide acetate is painful on application.', 'role': 'assistant'}]