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: Forensic Medicine
[{'content': 'The most reliable criteria in G uastaf son method of age estimation is: \nSelect and explain. \nA. Attrition, B. Secondary dentin deposition, C. Transparency of root, D. Cementum apposition', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Transparency of root', 'role': 'assistant'}]