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
With aging changes in periodontal ligament are 
Select and explain. 
A. Decrease in number of cells and increase in collagen fibers, B. Increase in number of cells and decrease in collagen fibers, C. Increase in number of elastic fibers, D. Hyalinisation changes
C: Increase in number of elastic fibers
Answer: C: Increase in number of elastic fibers 
Explanation: None