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': 'For a bodily movement of a small tooth the force required\nis \nSelect and explain. \nA. 25 - 30g, B. 40 - 75g, C. 120 - 150g, D. More than 150g', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]