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': 'Diagnostic test commonly used to determine the status\nof vitality of pulp is: \nSelect and explain. \nA. Radiography, B. Thermal testing, C. Computerized axial tomography scanning, D. Percussion and palpation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]