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 indicated -

• A. Acute cortical necrosis
• B. Acute tubular necrosis
• C. Pre-renal Azotemia
• D. Acute meullary necrosis