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
Non-pathogenic amoebae is/are- 
Select and explain. 
A. E. Histolyca, B. E. Coli, C. Acanthanmoeba, D. E. Hamanni
B: E. Coli
Answer: B: E. Coli 
Explanation: 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