A 3-year-old boy presents with a barking cough, inspiratory stridor and hoarse voice. He is alert with mild chest wall recession and oxygen saturation of 97 percent on air. What is the most appropriate treatment?ASingle oral dose of DexamethasoneBImmediate intubation and ventilationCNebulised Adrenaline aloneDHigh-dose oral antibioticsENo treatment and discharge without adviceCheck my answer