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': 'What is the amount of time required by erupting premolar to move through 1 mm of bone as measured on a bite-wing radiograph? \nSelect and explain. \nA. 3-4 months, B. 4-5 months, C. 5-6 months, D. 6-7 months', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]