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
Metronidazole: 
Select and explain. 
A. Has no side-effects, B. Is used in management of ANUG, C. Is mainly concentrated in saliva, D. Is active against gram-positive aerobes
B: Is used in management of ANUG
Answer: B: Is used in management of ANUG 
Explanation: None