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
All cause Rhinololia clausa except 
Select and explain. 
A. Allergic Rhinitis, B. Adenoids, C. Palatal paralysis, D. Nasal polyps
C: Palatal paralysis
Answer: C: Palatal paralysis 
Explanation: None