<prompt> Which does not predispose to cholangiocarcinoma:Ulcerative colitisClonorchis sinensisCholedochal cystChronic pancreatitis  <response>: Ans. is d i.e., Chronic pancreatitis Risk factors for CholangiocarcinomaPrimary sclerosing cholangitisCholedochal cystUlcerative colitis Mnemonic 5 CsClonorchis sinensis inf.Chronic typhoid carriersOther risk factorsHepatolithiasisBiliary enteric anastomosisLiver flukesDietary nitrosaminesExposure to thorotrast, dioxin 