A 40-year-old woman presents with weight loss, hyperpigmentation of the skin and postural dizziness. Her blood pressure is 90/60 mmHg. Blood tests show sodium 129 mmol/L and potassium 5.8 mmol/L. What is the most appropriate immediate management?AStart oral Prednisolone 5 mg daily as an outpatientBGive intravenous 0.9% sodium chloride and intravenous HydrocortisoneCStart fludrocortisone onlyDStart LevothyroxineENo specific treatment is requiredCheck my answer