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: Pharmacology
Drugs that can be used to treat infections caused by Bacteroides fragilis are all EXCEPT: 
Select and explain. 
A. Metronidazole, B. Erythromycin, C. Vancomycin, D. Amikacin
D: Amikacin
Answer: D: Amikacin 
Explanation: (Ref: KDT 6/e p729) Drugs used to treat anaerobic organisms include: Metronidazole Moxifloxacin and Trovafloxacin Vancomycin Clindamycin Chloramphenicol Aminoglycosides are ineffective against anaerobic organisms