This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of the Respiratory Tract, Subject name: Pediatrics
[{'content': 'Steeple sign is characteristis of - \nSelect and explain. \nA. Acute epiglotitis, B. Laryngotrancheobronchitis, C. In both, D. None of above', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Laryngotrancheobronchitis Croupy Me cause of acute upper airway obstruction.Mild upper RTI for 1-3 days followed by upper airway obstruction.Barking cough, hoarsness, Inspiratory stridor.X-ray shows subglottic narrowing or steeple sign.Acute epiglottitisy Acute potential fatal condition.Redpirafry progressine respiratory obstruction.Cherry red swollen epiglottis.X-ray shows thumb signy The steeple sign as seen on an anteroposterior neck X-ray of a child with croup", 'role': 'assistant'}]