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
In all of the following sympathectomy is effective except 
Select and explain. 
A. Intermittent claudication, B. Hyperhydrosis, C. Raynaud's disease, D. Causalgia
A: Intermittent claudication
Answer: A: Intermittent claudication 
Explanation: None