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': 'During which orthodontic tooth movement center of rotation is at the bracket slot: \nSelect and explain. \nA. Controlled movement, B. Torque, C. Rotation, D. Translation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]