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': 'Enterohemorrhagic, enterotoxigenic and enteroin enteroinvasive are types of: \nSelect and explain. \nA. E. coli, B. Klebsiella, C. Shigella, D. Streptococcus pneumoniae', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. a. E. coli', 'role': 'assistant'}]