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': 'Which of the following is false about gingival index? \nSelect and explain. \nA. It can be used for all teeth or selected teeth, B. it uses a scoring system of 0- 3, C. it requires the use of a periodontal probe, D. it requires the measurement of the pocket depth', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]