This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nose and paranasal sinuses, Subject name: ENT
[{'content': 'A 7 years child presents with unilateral nasal obstruction with foul-smelling nasal discharge. The diagnosis is \nSelect and explain. \nA. Foreign body, B. Rhinophyma, C. Rhinosporidiosis, D. Angiofibroma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Unilateral foul smelling discharge in a child is pathognomic of a foreign body.Ref: PL Dhingra, Diseases of Ear, Nose & Throat, 7th edition, pg no. 181', 'role': 'assistant'}]