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
Most abundant cells in Cell rich zone 
Select and explain. 
A. Fibroblasts, B. Odontoblasts, C. Ameloblasts, D. Undifferentiated mesencymal cells
A: Fibroblasts
Answer: A: Fibroblasts 
Explanation: None