This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory System, Subject name: Pediatrics
Organism in bronchiolitis is: 
Select and explain. 
A. Adeno virus, B. Influenza virus, C. Rhino virus, D. RSV
D: RSV
Answer: D: RSV 
Explanation: Ans: dRef: Pedia ghai, 6th ed, p.352