A 3-year-old boy presents with barking cough, hoarse voice and inspiratory stridor at rest but no agitation or drooling. He is alert with oxygen saturation 96% on room air. What is the most appropriate initial pharmacological treatment?ANebulised salbutamolBOral dexamethasone single doseCNebulised adrenaline onlyDIntravenous ceftriaxoneENo treatment; discharge homeCheck my answer