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
Sympathectomy is indicated in all following conditions, except: 
Select and explain. 
A. Ischemic ulcers, B. Intermittent claudication, C. Anhidrosis, D. Acrocyanosis
C: Anhidrosis
Answer: C: Anhidrosis 
Explanation: Lumbar sympathectomy is indicated in the treatment of hyperhydrosis and not anhydrosis. Other indications include superficial skin ulcer, causalgia, vasospastic disorders such as frostbite and raynaud's disease, hyperhydrosis, inoperable aerial occlusive disease with ischemia causing restpain. Ref: Manual of Vascular Surgery By A. K. Khanna, Pages 349-51