A 63-year-old woman with CKD stage 4 (eGFR 25 mL/min/1.73 m²) presents to the emergency department with weakness. ECG shows peaked T waves. Her serum potassium is 6.8 mmol/L. What is the most appropriate immediate pharmacological treatment?ANebulised salbutamol aloneB10 units of short-acting insulin IV with 50 mL of 50% dextroseCCalcium gluconate 10 mL of 10% solution IV over 2-5 minutesDOral sodium polystyrene sulfonateEIntravenous normal saline bolus onlyCheck my answer