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 cough and fever. The X-ray examination is suggestive of broncho-pneumonia. 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: Ans. is 'd' i.e., Mumps virus o The peak attack for viral pneumonia is between the age of 2"d and 3'd years and decrease thereafter. o Viruses causing pneumonia are - RSV Influenza