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: Medicine
[{'content': 'All are useful in management of severe clostridium difficle-infection, except \nSelect and explain. \nA. Vancomycin oral, B. Neomycin enema, C. IV metronidazole, D. Tigecycline', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. Neomycin enemaOral voncomycin plus intravenous metronidazole is the treatment of choice for patients with severe und complicated clostrdium dilificle infection (CDI)', 'role': 'assistant'}]