A 7-year-old girl with known asthma presents with acute wheeze and shortness of breath. She is speaking in short sentences, respiratory rate 32/min, PEFR 55% predicted, oxygen saturation 95% on air. What is the most appropriate initial management?AOral Prednisolone onlyBHigh-dose inhaled Salbutamol via spacer and consider oral PrednisoloneCImmediate IV magnesium sulphateDNo treatment required as PEFR is normalEStart long-acting beta agonistCheck my answer