The findings supporting a diagnosis of pre-renal rather than established acute renal failure are
A
Oliguria <700 ml per day
B
A urinary osmololity>600 mosmol/kg
C
A urinary sodium cone
D
<20 mosmol/l
E
Urine / plasma urea ratio> 10: 1
F
Hypertension rather than hypotension
Correct Answer: Oliguria <700 ml per day, A urinary osmololity>600 mosmol/kg, A urinary sodium cone, <20 mosmol/l