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
Which is true abt primary sclerosing cholangitis- 
Select and explain. 
A. Alkaline phosphatase levels are normal, B. Bilirubinm levels are increased, C. Liver enzymes are not increased, D. No risk of malignancy
B: Bilirubinm levels are increased
Answer: B: Bilirubinm levels are increased 
Explanation: In primary sclerosing cholangitis, Liver enzymes are elevated, Bilirubin levels increase during acute cholangitis. Reference: Davidson, 23rd edition, page 889