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
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 
Select and explain. 
A. abd, B. bcd, C. abc, D. ab
A: abd
Answer: A: abd 
Explanation: None