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': 'Retropharyngeal space infection is mainly due to\nspread of \nSelect and explain. \nA. Cervical tuberculosis, B. Meningo encephalitis, C. Mumps, D. Odontogenic infections', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]