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': 'Tooth movement most likely to relapse unless retention is provided in: \nSelect and explain. \nA. Tipping, B. Rotation, C. Extrusion, D. Bodily movements', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]