This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
[{'content': "A patient presenting with history of diarrhoea for several years with recent onset pruritus and raised alkaline phosphatase, normal SGOT/PT and USG shows no gallstones and biliary tract abnormality, the diagnosis is \nSelect and explain. \nA. Hodgkin's lymphoma, B. Sclerosing cholangitis, C. Autoimmune hepatitis, D. Viral hepatitis", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Symptoms of PSC Evidence of cholestatic liver disease - Jaundice, Pruritus and fatigue Diagnosis Asymptomatic elevation of GGT is the earliest finding, ALP and bile acids are also increased. Cholangiography - diagnoisis of PSC with evidence of diffuse multifocal strictures found in both intrahepatic and extrahepatic bile ducts Ref: Sabiston 20th edition Pgno :1508-1509', 'role': 'assistant'}]