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
ENT examination of an old man shows roomy nasal cavities, crust formation and woody hard external nose; which are seen in: 
Select and explain. 
A. Rhinoscleroma, B. Rhinosporidiosis, C. Atrophic rhinitis, D. None of the above
A: Rhinoscleroma
Answer: A: Rhinoscleroma 
Explanation: Rhinoscleroma: It is a rare, chronic progressive granulomatous disease of the upper respiratory tract caused by Klebsiella rhinoscleromatis.