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 are the most important proteinases involved in destruction of the periodontal tissues? 
Select and explain. 
A. Hylauronidase, B. Matrix metalloproteinases, C. Glucuronidase, D. Serine proteinases
B: Matrix metalloproteinases
Answer: B: Matrix metalloproteinases 
Explanation: Matrix metalloproteinases are the most important proteinases involved in the destruction of periodontal tissues.