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
Cementum formation is more rapid in: 
Select and explain. 
A. Apical portion., B. Coronal portion., C. Even over the entire root., D. At furcation.
A: Apical portion.
Answer: A: Apical portion. 
Explanation: None