This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: parasitology, Subject name: Microbiology
[{'content': 'Non-pathogenic amoebae is/are- \nSelect and explain. \nA. E. Histolyca, B. E. Coli, C. Acanthanmoeba, D. E. Hamanni', 'role': 'user'}, {'content': 'Answer: B \nExplanation: NON PATHOGENIC AMOBAE ARE E.coli E.gingivalis E.dispar E.hamanni Endolimax nana Iodamoeba buetschlii TEXTBOOK OF MEDICAL PARASITOLOGY,BAVEJA,3RD EDITION,PAGE NO 15', 'role': 'assistant'}]