This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Enterobecteriaceae, Subject name: Microbiology
[{'content': 'Most common causative agent of UTI in females - \nSelect and explain. \nA. Staph saprophyticus, B. E.coli, C. Klebsiella, D. Proteus', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., E. coli o E. coli causes 80-90% of acute uncomplicated bacterial lower tract infections (cystitis) in young women.", 'role': 'assistant'}]