<prompt> Steeple sign is seen in -Acute epiglottisLaryngotracheobronchitis croupIn both casesNone of above  <response>: Ans. is b i.e., Laryngotracheobronchitis croup Croupo Me cause of acute upper airway obstruction,o Mild upper RTI for 1-3 days followed by upper airway obstruction,o Barking cough, hoarsness, Inspiratory stridor,o X-ray shows subglottic narrowing or steeple sign.Acute epiglottitiso Acute potential fatal condition,o Redpiratry progressine respiratory obstruction,o Cherry red swollen epiglottis,o X-ray shows thumb sign.The steeple sign as seen on an anteroposterior neck X-ray of a child with croupNeck X-ray showing thumb sign. 