This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
[{'content': 'All of the following variables can predict survival in a patient with primary sclerosing cholangitis Except \nSelect and explain. \nA. Serum bilirubin level, B. Splenomegaly, C. Presence of AMA (Antimitochondrial antibody) in high titre, D. Histologic stage', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Primary sclerosing cholangitisThe prognosis is unourable, with a median survival of 9 to 12 years following the diagnosis, regardless of therapy.Four variables (age, serum bilirubin level, histologic stage, and splenomegaly) predict survival.The diagnosis is suppoed by a positive AMA test.The presence of AMA in high titer is unrelated to the clinical or histologic picture.', 'role': 'assistant'}]