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
The plexus of Rashkov is present in which of the following zones in pulp? 
Select and explain. 
A. Cell free zone, B. Cell rich zone, C. Odontoblastic zone, D. Pulp core
A: Cell free zone
Answer: A: Cell free zone 
Explanation: None