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: Anaesthesia
[{'content': 'All of the following are advantage of epidural anaesthesia over spinal anaesthesia except – \nSelect and explain. \nA. Dural puncture is avoided, B. Chances of meningitis are very low, C. Post spinal headache is avoided, D. Its duration of action is very short', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Duration of action of epidural anesthesia is longer than spinal anesthesia.', 'role': 'assistant'}]