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
Example of the pulp vitality test are all except: 
Select and explain. 
A. Laser doppler flowmetry., B. EPT, C. Pulse oxymetry., D. None
B: EPT
Answer: B: EPT 
Explanation: None