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': 'Post dural puncture headache is \nSelect and explain. \nA. Retro-orbital, B. Frontal, C. Occipital, D. Temporal', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Post dural puncture headache is occipital > frontal > retroorbital.', 'role': 'assistant'}]