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': 'Which of the following test is the test of Integrity of PDL: \nSelect and explain. \nA. Percussion test., B. Thermal test., C. Mobility depressibilty testing., D. EPT.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: PERCUSSION test → is the test of INTEGRITY of Pdl', 'role': 'assistant'}]