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
Which of the following dentinal layers is more mineralized 
Select and explain. 
A. Peritubular dentin, B. Inter tubular dentin, C. Dentinal tubules, D. Circum pulpal dentin
A: Peritubular dentin
Answer: A: Peritubular dentin 
Explanation: None