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': 'Chandu a 15 year aged boy presents with unilateral nasal blockade, mass in the cheek and epistaxis; likely diagnosis is - \nSelect and explain. \nA. Nasopharyngeal ca, B. Angiofibroma, C. Inverted papilloma, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Recurrent epistasis, nasal obstruction and swelling over cheek in a 15 years boy suggest the diagnosis of NFA.', 'role': 'assistant'}]