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 is best suited to diagnose acute apical periodontitis \nSelect and explain. \nA. Percussion, B. Thermal tests, C. Electric pulp tests, D. Anaesthetic test', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]