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General Medicine General dc8b27e2

Investigations in a patient of oliguria revealed: Urine osmolality: 800 mOsm/kg. Urinary sodium 10 mmol/L.BUN: creatinine=20:1. What is the most likely diagnosis?

A
Pre-renal acute renal failure
B
Acute tubular necrosis
C
Acute coical necrosis
D
Urinary tract obstruction

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