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': 'This is used in treatment of \nSelect and explain. \nA. Migraine, B. Post dural puncture headache, C. Spondylolisthesis, D. Disc prolapse', 'role': 'user'}, {'content': 'Answer: B \nExplanation: This is autologous epidural blood patch, used in treatment of post dural puncture headache.', 'role': 'assistant'}]