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
Of all the pulpal sensibility test, which is best in a patient who is restored with Porcelain fused to metal crown? 
Select and explain. 
A. Cold test, B. Heat test, C. EPT, D. Pulse oximetery
A: Cold test
Answer: A: Cold test 
Explanation: None