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': 'Microbes with Et, Eh and EP strains: \nSelect and explain. \nA. E. coli, B. Mycobacterium, C. Shigella, D. Neisseria', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is (a) E. coli', 'role': 'assistant'}]