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 tendency for drifting of posterior teeth into extraction space is more in 
Select and explain. 
A. Mandible, B. Maxilla, C. Maxilla and Mandible, D. Primary than Permanent teeth
B: Maxilla
Answer: B: Maxilla 
Explanation: None