<prompt> Croup syndrome is usually caused by a Rhinovirusesb Coxsackie A virusc Coxsackie B virusd Para influenzabcacad  <response>: Croup LaryngotracheobronchitisCroup is a viral infection of the upper respiratory tract.Children between the age of 1-5 years are affected.Causative organisms Parainfluenza type I, RSV, Influenza, Adenovirus, Rhinovirus 