A 30-year-old man presents with haematuria and flank pain. Serum creatinine is 140 µmol/L (baseline 80 µmol/L) after starting high-dose NSAIDs for back pain. According to KDIGO and Australian AKI guidance, how is acute kidney injury defined?AIncrease in serum creatinine by >=10 µmol/L within 48 hoursBIncrease in serum creatinine by >=26.5 µmol/L within 48 hours or >=1.5 times baseline within 7 days and/or reduced urine outputCAny creatinine above the laboratory reference rangeDPresence of proteinuria aloneEeGFR <60 mL/min/1.73 m² for >3 monthsCheck my answer