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
Which of the following drug is active against Provettela, Porphyromonas gingivalis: 
Select and explain. 
A. Tetracycline, B. Metronidazole, C. Augmenting, D. Ciprofloxacin
A: Tetracycline
Answer: A: Tetracycline 
Explanation: None