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': 'Where are the dentists feet during any procedure when four handed dentistry is practiced \nSelect and explain. \nA. On the stool support rim, B. On the floor, C. On the dental chair base, D. Where ever is convenient', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]