A 24-year-old man with known asthma presents with acute shortness of breath, speaking in phrases, RR 30/min, HR 115 bpm, PEFR 45% of predicted, SpO2 93% on air. What is the most appropriate immediate management?AStart IV Hydrocortisone and Aminophylline infusionBGive high-flow oxygen, repeated Salbutamol plus Ipratropium nebulisers and oral PrednisoloneCPrescribe oral Salbutamol tablets and discharge with GP follow-upDStart IV Salbutamol and admit to ICUEGive a single dose of oral Prednisolone and review in 4 hours without nebulisersCheck my answer