Croup syndrome is usually caused by-: (A) Rhinoviruses, (B) Coxsackie A virus, (C) Coxsackie B virus, (D) All
Answer is A. 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.