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: Dental
Drug of choice given in ANUG: 
Select and explain. 
A. Penicillin, B. Metronidazole, C. Both of the above, D. Tetracycline
C: Both of the above
Answer: C: Both of the above 
Explanation: None