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: ENT
[{'content': 'A person with neck node and B type tympanogram - \nSelect and explain. \nA. Acoustic neuroma, B. Nasopharyngeal CA, C. Angiofibroma, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Information in this question :\n\nCervical adenopathy (Neck node) :- Most common presentation of nasopharyngeal carcinoma.\nType B tympanogram :- Indicates serous otitis media, which may be a complication of nasopharyngeal carcinoma due to eustachian tube blockade.\n\nThus, among the given options, nasopharyngeal carcinoma is the answer of choice.', 'role': 'assistant'}]