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
[{'content': 'The centre of rotation for bodily movement of tooth is located at: \nSelect and explain. \nA. Apical 1/3rd of root, B. At infinity, C. Apical 2/3rd of root, D. Middle 1/3rd of root', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Bodily Movement\nThis is the most desirable type of tooth movement.\xa0In bodily movement, crown and root move the same\xa0distance either lingually or labially.\nFeatures of Bodily Movement:\n\nCenter of rotation is at infinity.\nForce applied: 70–120 g.\nMoment to force ratio: 10:1.\nLoading pattern: Uniform stress pattern in the periodontal\xa0ligament.', 'role': 'assistant'}]