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
Dentin formation is not a continuous process, the periods of rest are denoted by incremental lines 
Select and explain. 
A. Lines of Von Ebner, B. Lines of Owen, C. Neonatal lines, D. All of the above
A: Lines of Von Ebner
Answer: A: Lines of Von Ebner 
Explanation: Like other mineralized tissues dentin formation is not a continuous process, the periods of rest are denoted by incremental lines—the incremental lines of Von Ebner which are 4–8 mm apart run at right angles to the dentinal tubules.