<prompt> Predisposing factor for cholangiocarcinomaPSCGallstonesAnkylostomiasisAll of the above  <response>: Riskfactorsfor cholangiocarcinoma Choledochal cyst Primary sclerosing cholangitis Ulcerative colitis. RPC or hepatolithiasis. Biliary enteric anastomosis HBV, HIV, HCV Choledocholithiasis Clonorchis sinensis and opisthorchis viverrini Cirrhosis Radon Asbestos, Nitrosamines, DioxibAND. Diabetes, Obesity, OCPs, smoking, Thorotrast, IsoniazidDOSTI Ref: Sabiston 20th edition Pgno :1514 