This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
Most common agent responsible for Bronchiolitis is - 
Select and explain. 
A. RSV, B. Adenovirus, C. Herpesvirus, D. Influenza virus
A: RSV
Answer: A: RSV 
Explanation: In 25-30 %to lower respiratory involvement, including tracheobronchitis, bronchiolitis, and one monia are due to respiratory syncytial virus REF:ANANTHANARYANAN TEXTBOOK OF MICROBIOLOGY 9EDITION PGNO.511