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': 'Which of these are true of E. coli -a) The L.T (labile toxin) in ETEC acts via cAMPb) In types causing UTI the organism attaches via pilic) The ST (stable-toxin) of ETEC is responsible for causing hemolytic-uremic syndrome (HUS)d) EIEC invasiveness is under plasmid controle) In EPEC the toxin helps in invasion by the bacteria \nSelect and explain. \nA. abd, B. bcd, C. abc, D. ab', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]