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: 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: Ans. is 'b' i.e., RSV RSV is the most common cause of pneumonia and bronchilis in infants. In adults, influenza is the most common cause of viral pneumonia.