A 34-year-old woman suddenly develops generalised urticaria, wheeze, stridor and hypotension after eating peanuts. She is conscious but breathless with SpO2 88% on air. What is the most appropriate first-line treatment?AChlorphenamine 10 mg intravenousBAdrenaline 500 micrograms intramuscularly into the anterolateral thighCHydrocortisone 200 mg intravenousDSalbutamol nebuliser onlyERapid intravenous fluids without any drugsCheck my answer