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: Forensic Medicine
[{'content': 'A patient of head injury, has no relatives & requires urgent cranial decompression; Doctor should \nSelect and explain. \nA. Operate without formal consent, B. Take police consent, C. Wait for relatives to take consent, D. Take magistrate consent', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Operate with out formal consent', 'role': 'assistant'}]