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1. A 65-year-old man with a history of hypertension, diabetes and chronic
kidney disease is admitted to the hospital with acute kidney injury (AKI).
His blood pressure is 180/100 mmHg, his serum creatinine is 3.5 mg/dL
(normal range 0.6-1.2 mg/dL) and his urine output is 200 mL in the last 24
hours. What is the most likely cause of his AKI?
A) Prerenal AKI due to hypovolemia
B) Intrinsic AKI due to acute tubular necrosis
C) Postrenal AKI due to urinary obstruction
D) Intrinsic AKI due to glomerulonephritis
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