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': 'TRPV1 antagonist (eugenol) acts by \nSelect and explain. \nA. Decreasing permeability of Na+ ions, B. Inhibiting capsaicin, C. Inhibiting capsazipine, D. Increasing threshold of nerve', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]