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': 'Optimum  force for orthodontic bodily movement (translation) is: \nSelect and explain. \nA. 50 - 75 gms, B. 100 - 150 gms, C. 200 - 250 gms, D. 300 - 400 gms', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]