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
True about rhinoscleroma are all, EXCEPT: 
Select and explain. 
A. Caused by Klebsiella pneumonia, B. Slowly progressing granulomatous disease, C. Most common in young adults 20-30 years old, D. Poor nutrition contributes to its spread
A: Caused by Klebsiella pneumonia
Answer: A: Caused by Klebsiella pneumonia 
Explanation: Rhinoscleroma is a rare, slowly progressing granulomatous disease of the upper respiratory tract caused by Klebsiella rhinoscleromatis. Nasal disease presents with three typical stages: (1) catarrhal (2) proliferative (3) cicatrical. Rhinoscleroma may be found in all age groups, but typically young adults 20-30 years old are most frequently affected. Airborne transmission combined with poor hygiene, crowded living conditions, and poor nutrition contributes to its spread.