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
Testing with cold is carried out best: 
Select and explain. 
A. To localize papal pain, B. To localize periodontal pain, C. For detecting referred pain, D. To test pulp necrosis
A: To localize papal pain
Answer: A: To localize papal pain 
Explanation: None