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
According to GOTTLIB diffused atrophy of alveolar bone is: 
Select and explain. 
A. Periodontitis, B. Cementopathia, C. Periodontosis, D. Gingivosis
B: Cementopathia
Answer: B: Cementopathia 
Explanation: None