A 9-year-old boy receives a routine vaccination at a public health clinic and 10 minutes later develops generalised urticaria, wheeze and hypotension. What is the most appropriate immediate treatment?AAdminister intramuscular adrenaline 0.01 mg/kg of 1:1000 solution into the anterolateral thigh and call for help.BGive an oral antihistamine and observe.CAdminister intravenous hydrocortisone only.DPlace him in a sitting position and provide oxygen only.EObtain serum tryptase first to confirm anaphylaxis before treating.Check my answer