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': 'Sedation by which of the following routes can be reversed most rapidly: \nSelect and explain. \nA. Oral, B. Inhalation, C. Intravenous, D. Intramuscular', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]