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
[{'content': 'The bacterial enzyme detected in gingival crevicular fluid is \nSelect and explain. \nA. Fibronectin, B. Cytokines, C. Phospholipase, D. Myeloperoxidase', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]