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
The most reliable criteria in G uastaf son method of age estimation is: 
Select and explain. 
A. Attrition, B. Secondary dentin deposition, C. Transparency of root, D. Cementum apposition
C: Transparency of root
Answer: C: Transparency of root 
Explanation: C i.e. Transparency of root