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 distance between implant and adjustment tooth should be at least \nSelect and explain. \nA. 7 mm, B. 1.5 mm, C. 3.5 mm, D. 3.75 mm', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]