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 10 years child has unilateral nasal obstruction epistaxis, swelling over cheek, the diagnosis is - \nSelect and explain. \nA. Nasal polyp, B. Nasopharyngeal carcinoma, C. Angiofibroma, D. Foreign bodies', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]