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 child presented with a 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: Unilateral purulent nasal discharge with occasional bloody discharge in a child is highly suggestive of foreign body.\nAntrochoanal polyp does not cause bloody discharge.\nAngiofibroma most commonly presents with nasal obstruction and epistaxis (not purulent nasal discharge).\nRhinosporidiosis presents most commonly with polypoid mass.', 'role': 'assistant'}]