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
Sclerotic dentin has following features: 
Select and explain. 
A. Caries susceptible, B. Insensitive, C. Hypersensitive, D. Resistant to caries
D: Resistant to caries
Answer: D: Resistant to caries 
Explanation: None