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 cause of viral pneumonia in infant is - 
Select and explain. 
A. Rhinovirus, B. RSV, C. Reovirus, D. CMV
B: RSV
Answer: B: RSV 
Explanation: RSV can lead to tracheobronchitis,bronchiolitis and pneumonia. REF:ANANTHANARAYAN AND PANIKER'S TEXTBOOK OF MICROBIOLOGY 9TH EDITION PAGE NO:510,511