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': 'Minimum bone width required for a 4 mm diameter implant is about \nSelect and explain. \nA. 5 mm, B. 10 mm, C. 12 mm, D. 14 mm', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]