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: Surgery
[{'content': 'Ganglion which is spared in Lumbar sympathetomy is \nSelect and explain. \nA. L1, B. L2, C. L3, D. L4', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]