This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
Croup syndrome is usually caused by- 
Select and explain. 
A. Rhinoviruses, B. Coxsackie A virus, C. Coxsackie B virus, D. All
A: Rhinoviruses
Answer: A: Rhinoviruses 
Explanation: Ans. is 'a' i.e., Rhinoviruses Croup (Laryngotracheobronchitis) o Croup is a viral infection of upper respiratory tract. o Children between the age of 1-5 years are affected.