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': 'Best treatment of subdural haemotoma in a deteriorating patient- \nSelect and explain. \nA. By UV Mannitol, B. Oxygenation, C. Use of steroids, D. Surgical evacuation', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]