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: Microbiology
[{'content': 'Cyst and trophozite in stool \nSelect and explain. \nA. Mycoplasma, B. Toxoplasma, C. Leptospira, D. Treponema', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Toxoplasma', 'role': 'assistant'}]