This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': "Tuohy's needle is used for \nSelect and explain. \nA. Spinal block, B. Epidural block, C. Saddle block, D. Brachial plexus block", 'role': 'user'}, {'content': "Answer: B \nExplanation: Tuohy's needle used for epidural anaesthesia has blunt bevel with 15 to 30 curve at tip.", 'role': 'assistant'}]