Pediatrics General 2051f7cc Croup syndrome is usually caused by- A Rhinoviruses B Coxsackie A virus C Coxsackie B virus D All High-Yield 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.