<prompt> 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 -Parainfluenza virusesInfluenza virus ARespiratory syncytial virusMumps virus  <response>: Ans. is d i.e., Mumps virus o The peak attack for viral pneumonia is between the age of 2d and 3d years and decrease thereafter. o Viruses causing pneumonia are - RSV Influenza 