This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Medicine
Not a risk for cholangio carcinoma - 
Select and explain. 
A. Hepatolithiasis, B. Hepatitis C, C. Clonorchi sinensis, D. Choledocholithiasis
A: Hepatolithiasis
Answer: A: Hepatolithiasis 
Explanation: </p> Davidson&;s principles and practice of medicine 22nd edition. *The tumour is associated with gallsgallstones,primary and secondary cholangitis,caroli&;s disease and choledochalcyst,chronic liver fluke infection (clonorchis sinensis) is the major risk factor for development for CCA.</p>