A 2-year-old child presents with fever of 39.2 °C, barking cough and inspiratory stridor at rest. He has sternal recession but is not cyanosed. What is the most appropriate immediate treatment?AOral prednisolone and discharge homeBNebulised adrenaline and dexamethasone, with close observationCBroad-spectrum intravenous antibioticsDChest physiotherapy and saline nebulisersENo treatment, as this is a self-limiting viral illnessCheck my answer