This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Microbiology
[{'content': 'Which parasite lives in bladder plexus? \nSelect and explain. \nA. Schistosoma, B. Fasciola, C. Ascaris, D. Echinococcus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: All the schistosomes live in venous plexus in the body of definitive host S. haematobium in urinary bladder S.mansoni in sigmodorectal region S. japonicum in ileocaecal region', 'role': 'assistant'}]