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: Pharmacology
Drug of choice for bacterial vaginosis is : 
Select and explain. 
A. Metronidazole, B. Ampicillin, C. Ciprofloxacin, D. Fluconazole
A: Metronidazole
Answer: A: Metronidazole 
Explanation: None