This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
[{'content': 'Each of the following organisms is an important cause of urinary tract infections except: \nSelect and explain. \nA. Klebsiella pneumonia, B. Escherichia coli, C. Bacteroides fragilis, D. Proteus mirabilis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C. Bacteroides fragilisAnaerobic bacteria are implicated in various infections including mainly puerperal sepsis & genital infections, wound infections & intra-abdominal infections.', 'role': 'assistant'}]