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 centre of rotation for bodily movement of tooth is located at: 
Select and explain. 
A. Apical 1/3rd of root, B. At infinity, C. Apical 2/3rd of root, D. Middle 1/3rd of root
B: At infinity
Answer: B: At infinity 
Explanation: Bodily Movement
This is the most desirable type of tooth movement. In bodily movement, crown and root move the same distance either lingually or labially.
Features of Bodily Movement:

Center of rotation is at infinity.
Force applied: 70–120 g.
Moment to force ratio: 10:1.
Loading pattern: Uniform stress pattern in the periodontal ligament.