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': 'Which of the following general anesthetic techniques should be used for anesthesia in oral surgery: \nSelect and explain. \nA. Open drop method, B. Anesthesia with nasopharyngeal airway, C. Nasoendotracheal tube with throat pack, D. I.V. anesthesia with nitrous oxide and oxygen', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]