This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Surgery
Ganglia spared in lumbar sympathectomy - 
Select and explain. 
A. L1, B. L2, C. L3, D. L4
A: L1
Answer: A: L1 
Explanation: Ans. is 'a' i.e., LI * If unilateral sympathectomy is done, LI L2, L3 and L4 ganglia needs removal for sympathetic denervation of lower limb.* If bilateral sympathectomy is done, on one side LI ganglion is to be preserved otherwise patient will develop impotence.