<prompt> Cholangio carcinoma of liver caused byHepatitis B infectionCirrhosis of liverAlpha - feto proteinClonorchis sinensis infection  <response>: risk factor of cholangio carcinoma includes Primary sclerosis cholangitis Fibropolypocystic disease of biliary tree Infestation by Clonorchis sinensis or Opisthorchis viverrini. ROBBINS BASIC PATHOLOGY NIanTH EDITION PAGE 643 