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: Medicine
[{'content': 'Which is true abt primary sclerosing cholangitis- \nSelect and explain. \nA. Alkaline phosphatase levels are normal, B. Bilirubinm levels are increased, C. Liver enzymes are not increased, D. No risk of malignancy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In primary sclerosing cholangitis, Liver enzymes are elevated, Bilirubin levels increase during acute cholangitis. Reference: Davidson, 23rd edition, page 889', 'role': 'assistant'}]