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': 'ENT examination of an old man shows roomy nasal cavities, crust formation and woody hard external nose; which are seen in: \nSelect and explain. \nA. Rhinoscleroma, B. Rhinosporidiosis, C. Atrophic rhinitis, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Rhinoscleroma: It is a rare, chronic progressive granulomatous disease of the upper respiratory tract caused by Klebsiella rhinoscleromatis.', 'role': 'assistant'}]