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': 'Supraclavicular block is used for surgery of ? \nSelect and explain. \nA. Shoulder, B. Neck, C. Arm, D. Forearm', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is `c > a, d' i.e., Arm > Shoulder, Forearm", 'role': 'assistant'}]