A child with 22-25 stool/day, 3 day old pneumonitis, no passage of urine from 36 hours. low B.P. Blood pH – 7.21. Urine Na+–18 meq/L, S. Urea 120, serum Creatinine 1.2 indicate –

History and clinical features of the child suggests that he is suffering from acute renal failure. From the given values we have to get the cause of this renal failure. H/o diarrhea with low BP suggest dehydration —> a cause of prerenal ARE