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': "Standard airway for Ludwig's Angina: \nSelect and explain. \nA. Tracheostomy, B. Cricothyrotomy, C. Nasal intubation, D. Oral intubation", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]