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': 'Resorption in case of ideal orthodontic tooth movement\nshould be \nSelect and explain. \nA. Undermining, B. Frontal, C. Indirect, D. Necrotic', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]