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
The dentin adjacent to the dentinoenamel junction is called the 
Select and explain. 
A. Mantle dentin, B. Circumpulpal dentin, C. Predentin, D. Secondary dentin
A: Mantle dentin
Answer: A: Mantle dentin 
Explanation: None