This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nasal Polyposis, Subject name: ENT
[{'content': 'A child presented with history of unilateral purulent nasal discharge with occasional bloody discharge from the same side, the diagnosis is: \nSelect and explain. \nA. Antrochoanal polyp, B. Foreign body, C. Angiofibroma, D. Rhinosporidiosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: (b) Foreign body(Ref. Scott Brown, 8th ed., Vol 2; 243)Antrochoanal polyp usually presents with unilateral nasal obstruction. Nasal discharge if occurs is mucoid.Angiofibroma presents with repeated torrential or profuse epistaxis in pubertal males.Rhinosporidiosis presents with epistaxis and a mulberry nasal mass.', 'role': 'assistant'}]