Croup is most commonly due to -
Ans, is 'b' i.e., The para influenza virus Croup tLarvngotracheobronchitislo Croup is a viral infection of upper respiratoiy tract,o Children between the age of 1-5 years are affected,o Para-influenza type I virus is the most common causative organism.o Other viruses implicated in causaction are RSV, influenza virus, Adneovirus and Rhinovirus.
Myxo Viruses
The respiratory' syncytial virus
The para influenza virus
The adenovirus
The coronavirus
The para influenza virus