Cholangiocarcinoma is caused by -a) Fasciola infestationb) Clonorchis infestationc) Paragonimus infestationd) Ascaris infestatione) None of these: (A) ac, (B) ab, (C) ad, (D) bc
Answer is B. Parasites

Schistosoma haematobium
Clonorchis sinensis
Opisthorchis viverrini

Malignancy

Squamous cell carcinoma of urinary bladder
Cholangiocarcinoma of liver, bile duct and Adenocarcinoma of pancreas
Cholangiocarcinoma of bile duct