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: Surgery
[{'content': 'The common organism isolated in Emphysematous pyelonephritis is - \nSelect and explain. \nA. E.Coli, B. Proteus, C. Pseudomonas, D. Klebsiella', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]