Which type of acute kidney injury (acute renal failure) is most commonly associated with highly concentrated urine? Although the patient usually is hypovolemic or in shock, the urine specific gravity (USG) is high because the kidney still has the ability to reabsorb water to combat dehydration.
Options:
A) pre-renal failure.
B) intra-renal (intrinsic) failure.
C) post-renal failure.
D) All of the above types of AKI will cause a concentrated urine.