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 –: (A) Parainfluenza viruses, (B) Influenza virus A, (C) Respiratory syncytial virus, (D) Mumps virus
Answer is D. 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