A 22 year old woman is evaluated in the emergency for a 3 day h/o dark urine and abdominal distension. O/E: normal mental status, icterus present, hea and lungs normal, Hematocrit: 26, Reticulocytes: 5%, Platelets: 1.3 lakhs, Alk.Phos: 30 units/L, ALT: 110 units/L, AST: 220 units/L, Total bilirubin:13mg% (Direct:4 mg) HBsAg positive and Hepatitis 'A' &'C' negative. Urine drug screen negative. USG abdomen shows a nodular appearing liver and enlarged spleen. Which is the most likely diagnosis?