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 is the immediate danger to a patient with severe facial injuries \nSelect and explain. \nA. Bleeding, B. Associated fracture spine, C. Infection, D. Respiratory obstruction', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]