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
Stellate ganglion block is useful in: 
Select and explain. 
A. Sudeck osteodystrophy, B. Compound palmar ganglion, C. Tenosynovitis, D. Osteoahritis of first CMC joint
A: Sudeck osteodystrophy
Answer: A: Sudeck osteodystrophy 
Explanation: A i.e. Sudeck osteodystrophy