A 3-year-old boy presents with a barking cough, stridor when agitated and hoarse voice. He is afebrile and has mild chest wall recession but is able to drink. What is the most appropriate single treatment in the emergency department?ANebulised saline aloneBNebulised adrenaline onlyCSingle dose oral dexamethasoneDImmediate endotracheal intubationEHigh-dose oral amoxicillinCheck my answer