A 68-year-old man with chronic kidney disease (eGFR 28 mL/min/1.73 m²) presents with bilateral ankle oedema and mild breathlessness. His potassium is 5.7 mmol/L and bicarbonate 18 mmol/L. What is the MOST appropriate next step in management?AIncrease ACE inhibitor doseBRefer to nephrology for urgent assessment and optimise chronic kidney disease managementCStop all antihypertensives immediatelyDIgnore biochemical abnormalities and treat oedema with high-dose frusemide onlyEStart high-dose potassium supplementsCheck my answer