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: Surgery
[{'content': 'All of the following extraintestinal manifestations of ulcerative colitis respond to colectomy except \nSelect and explain. \nA. Primary sclerosing cholangitis, B. Pyoderma gangrenosum, C. Episcleritis, D. Peripheral ahralgia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: .Treatment of Primary sclerosing cholangitis includes * Stenting. * T-tube drainage. * Large dose steroids * Immunosuppression therapy - methotrexate, azathioprine, tacrolimus, cyclosporine. * Ursodeoxycholic acid is beneficial. * Liver transplantation. ref:SRB &;s manual of surgery,ed 3,pg no- 590', 'role': 'assistant'}]