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': 'Non-pathogenic amoebae is/are -a) E. histolyticab) E.coli.c) Acanthamoebad) E.Hartmannie) Balamuthia \nSelect and explain. \nA. c, B. d, C. ab, D. bd', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Non-pathogenic amebae are E.hartmanni, E.coli, E.polecki, Endolimax nana, Iodamoeba botschlii, and Dientamoeba fragilis.', 'role': 'assistant'}]