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': 'Type of speech seen in nasopharyngeal carcinoma - \nSelect and explain. \nA. Rhinolalia clausa, B. Rhinolalia aperta, C. Hot potato voice, D. Hoarse voice', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Nasopharyngeal carcinoma causes denasal speech, i.e. Rhinolalia clausa.', 'role': 'assistant'}]