This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': 'Primary sclerosing cholangitis, true are -a) ↑ Femalesb) Associated with IBDc) Involves intra & extrahepatic ductsd) ERCP not helpful \nSelect and explain. \nA. a, B. bc, C. ac, D. ad', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]