This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Anatomy
[{'content': 'Drugs that can be used to treat infection caused by bacteroides fragilis are all except \nSelect and explain. \nA. Metronidazole, B. Trovafloxacin, C. Vancomycin, D. Amikacin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: (Ref KDT 6/e p719. 720 Drugs used to treat anaerobic organisms include Metronidazole Moxifloxacin and Trovafloxacin Vancomycin Clindamycin Aminogycosides are ineffective against anaerobic organisms', 'role': 'assistant'}]