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
Arestin is: 
Select and explain. 
A. 2% minocycline, B. 1% minocycline, C. 0.5% minocycline, D. 0.1% minocycline
A: 2% minocycline
Answer: A: 2% minocycline 
Explanation: None