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
Breakdown of periodontal fibres in periodontitis is due to bacterial enzyme: (OR) Which of the following bacterial products have been implicated in initiation of inflammatory periodontal disease? 
Select and explain. 
A. Collagenase, B. Hyaluronidase, C. Coagulase, D. None of the above
A: Collagenase
Answer: A: Collagenase 
Explanation: None