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: Anatomy
[{'content': 'False about PSC \nSelect and explain. \nA. PSC in UC, the association is 30%, B. Low incidence of cholangitis, C. Increased incidence of colonic carcinoma in PSC+UC, D. Despite the presence of diffuse disease, hepatic duct bifurcation is most severely structured segment', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Primary sclerosing cholangitis PSC is a cholestatic liver disease characterized by fibrotic strictures involving intrahepatic and extrahepatic biliary tree in the absence of a known precipitating cause More common in HLA B8/DR3 Incidence of UC in PSC ranges from 75-80% PSC is present in 5.5% of patients with chronic UC Ref: Sabiston 20th edition Pgno :1508-1509', 'role': 'assistant'}]