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
Primary sclerosing cholangitis, true are - 
Select and explain. 
A. Females, B. Associated with IBD, C. Involves intra & extrahepatic ducts, D. ERCP not helpful
B: Associated with IBD
Answer: B: Associated with IBD 
Explanation: Ref image Davidson 23e p888