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 histological section of tooth under orthodontic force representing an avascular area in the periodontal ligament is often referred as 
Select and explain. 
A. Frontal zone, B. Hyalanized zone, C. Undermining zone, D. Clear zone
B: Hyalanized zone
Answer: B: Hyalanized zone 
Explanation: None