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: Pathology
[{'content': 'Which of the following is a non-destructive method of age estimation in adults? \nSelect and explain. \nA. Assessment of root dentin translucency, B. Amino acid racemisation, C. Evaluation of tooth cementum annulations, D. Pulp to tooth ratio of canines', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]