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: Medicine
Ciliocytophthoria caused by 
Select and explain. 
A. Kaagener syndrome, B. Fungal infection, C. Viral infection, D. Bacterial infection
C: Viral infection
Answer: C: Viral infection 
Explanation: Answer- C. Viral infectionIt is well known that acute inflammation of the upper airways are caused mainly by viruses, even though after the viral infection a bacterial overlapped infection follows, paly ored by the cytopathic effect of the virus itself on the mucosa.