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': 'PERIOTEST is used for detecting \nSelect and explain. \nA. Enzymes in GCF, B. Tooth mobility, C. Antibodies, D. Inflammatory mediators', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]