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
A child presented with a history of unilateral purulent nasal discharge with occasional bloody discharge from the same side, The diagnosis is - 
Select and explain. 
A. Antrochoanal polyp, B. Foreign body, C. Angiofibroma, D. Rhinosporidiosis
B: Foreign body
Answer: B: Foreign body 
Explanation: Unilateral purulent nasal discharge with occasional bloody discharge in a child is highly suggestive of foreign body.
Antrochoanal polyp does not cause bloody discharge.
Angiofibroma most commonly presents with nasal obstruction and epistaxis (not purulent nasal discharge).
Rhinosporidiosis presents most commonly with polypoid mass.