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