This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Liver & Biliary Tract, Subject name: Pathology
Florid duct lesions are diagnostic of 
Select and explain. 
A. Klatskin tumor, B. Primary sclerosing cholangitis, C. Primary biliary cirrhosis, D. Secondary biliary cirrhosis
C: Primary biliary cirrhosis
Answer: C: Primary biliary cirrhosis 
Explanation: Ans. (c) Primary biliary cirrhosis(Ref: Robbins 9th/pg 858; 8th/pg 867)In Primary biliary cirrhosis: Interlobular bile ducts are actively destroyed by lymphoplasmacytic inflammation with or without granulomas (the florid duct lesion)