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 of the following excepta) Ischaemic ulcersb) Intermittent claudicationc) Anhidrosisd) Acrocyanosis 
Select and explain. 
A. a, B. c, C. ac, D. bc
D: bc
Answer: D: bc 
Explanation: Sympathectomy is used for the treatment of hyperhydrosis and would worsen anhydrosis rather than treating it.