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': 'Most common organism causing peritonitis is \nSelect and explain. \nA. Klebsiella, B. E.coli, C. Staphylococcus aureus, D. Streptococcus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Most common cause of Peritonitis is E.coli 2nd most common cause is Klebsiella.', 'role': 'assistant'}]