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
[{'content': "Early recovery of Sudeck's atrophy can be best seen by: \nSelect and explain. \nA. Intraarterial injection of articaine., B. Intraarterial injection of novacaine., C. Both., D. None.", 'role': 'user'}, {'content': 'Answer: B \nExplanation: It is claimed to be the most successful treatment', 'role': 'assistant'}]