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
Rhinoscleromatis is caused by - 
Select and explain. 
A. Klebseilla, B. Autoimmune, C. Spirochetes, D. Rhinosporidium.
A: Klebseilla
Answer: A: Klebseilla 
Explanation: Rhinoscleroma is caused by Klebsiella rhinoscleromatis or Frisch bacillus.