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': 'For reduction of shoulder one of the following technique is appropriate – \nSelect and explain. \nA. Spinal anesthesia, B. Interscalene block, C. Axillary brachial block, D. Bier block', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Appropriate brachial plexus blocks per site-specific procedures', 'role': 'assistant'}]