A 4 year old child was brought to the ER with an acute onset of shortness of breath. On examination, the child is cyanosed, and his tongue is protruding out of his mouth and he is drooling saliva. You can appreciate a stridor as well .

His lateral neck X-ray shows the following. What could be the diagnosis for this child? Source: Stalkmed *This image based case is from Docplexus Editorial Team for educative purpose only.