This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Myxo Viruses, Subject name: Microbiology
Croup is most commonly due to - 
Select and explain. 
A. The respiratory' syncytial virus, B. The para influenza virus, C. The adenovirus, D. The coronavirus
B: The para influenza virus
Answer: B: The para influenza virus 
Explanation: 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.