A 70-year-old man with CKD stage 4 (eGFR 20 mL/min/1.73 m²) presents with potassium 6.3 mmol/L, peaked T waves on ECG and mild weakness. According to emergency management principles, what is the most appropriate immediate therapy?ANebulised salbutamol aloneBIV calcium gluconate followed by insulin with dextrose and consideration of definitive potassium removalCOral sodium polystyrene sulfonate onlyDStop ACE inhibitor and recheck potassium in 24 hoursENo treatment is required until potassium exceeds 7.0 mmol/LCheck my answer