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: Anaesthesia
A successful stellate ganglion block can produce – 
Select and explain. 
A. Hypotension, B. Horner syndrome, C. Brachial plexus involvement, D. Hemifacial anaesthesia
B: Horner syndrome
Answer: B: Horner syndrome 
Explanation: None