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': 'Under normal physiological conditions, cementum shows: \nSelect and explain. \nA. Resorption, B. Adaptive mechanism, C. Resorption., D. All of the above.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]