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: Pharmacology
Intravenous regional anesthesia is suitable for : 
Select and explain. 
A. Orthopedic manipulation on the upper limb, B. Vascular surgery on the lower limb, C. Head and neck surgery, D. Caesarian section
A: Orthopedic manipulation on the upper limb
Answer: A: Orthopedic manipulation on the upper limb 
Explanation: None