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': 'Anchorage is better provided by \nSelect and explain. \nA. Single rooted teeth, B. Multi rooted, C. Narrow rooted, D. Small rooted teeth', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]