<prompt> The following sign on X ray neck is seen in which of the following diseases?Acute epiglottitisLaryngotracheobronchitisLaryngomalaciaAcute Bronchiolitis  <response>: The given x ray shows Steeple sign due to subglottic narrowing which is characteristically seen in Acute Laryngotracheobronchitis Croup. Acute epiglottitis- thumb sign on lateral X-ray neck. 