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: Pediatrics
An infant develops a cough and fever. The X-ray examination is suggestive of bronchopneumonia. All of the following viruses can be the causative agent except – 
Select and explain. 
A. Parainfluenza viruses, B. Influenza virus A, C. Respiratory syncytial virus, D. Mumps virus
D: Mumps virus
Answer: D: Mumps virus 
Explanation: The peak attack for viral pneumonia is between the age of 2nd and 3rd years and decrease thereafter.

Viruses causing pneumonia are -

RSV
Influenza
Adenovirus
Rhinovirus
Parainfluenza virus