A 4-year-old boy presents with a 24-hour history of barking cough, stridor at rest and mild recession. He is alert with oxygen saturation 96% on air. According to UK guidance, what is the most appropriate initial treatment?ANebulised Adrenaline alone and immediate intubation.BSingle dose oral Dexamethasone.CHigh-dose inhaled Salbutamol via spacer.DImmediate broad-spectrum intravenous antibiotics.ENo treatment and discharge with reassurance only.Check my answer