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': 'Example of the pulp vitality test are all except: \nSelect and explain. \nA. Laser doppler flowmetry., B. EPT, C. Pulse oxymetry., D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]