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
Hardness of fully mineralized cementum is 
Select and explain. 
A. Less than dentin, B. More than dentin, C. Equal dentin, D. None of the above
A: Less than dentin
Answer: A: Less than dentin 
Explanation: None