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': 'Standard force for evaluating periodontal pockets that have been found to be well tolerated is \nSelect and explain. \nA. 0.65 N, B. 0.75 N, C. 0.85 N, D. 0.95 N', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]