A 3-year-old boy presents with a barking cough, inspiratory stridor and hoarse voice. He is febrile at 38.2 °C but maintains oxygen saturation of 97% on room air and is not distressed at rest. What is the most appropriate initial treatment?ANebulised adrenaline onlyBSingle dose of oral dexamethasoneCIntravenous ceftriaxoneDImmediate endotracheal intubationENo treatment and dischargeCheck my answer