This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
The following parasitic infections predispose to malignancies -a) Paragonimus westermaniib) Guinea worm infectionc)  Clonorchiasisd)  Schistosomiasis 
Select and explain. 
A. ab, B. cd, C. bd, D. ac
B: cd
Answer: B: cd 
Explanation: The following two parasites have definitive etiological association with malignancies:
• Clonorchis sinensis: cholangiocarcinoma
• Opisthorchis viverrini: cholangiocarcinoma
• Schistosoma haematobium : squamous cell cancer of urinary bladder
• Schistosoma japonicum: colorectal cancer