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': 'Amino acid that is high in root dentin used for age estimation is \nSelect and explain. \nA. Tyrosine, B. Serine, C. Aspartic acid, D. Glycine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]