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
Which of the following is false about gingival index? 
Select and explain. 
A. 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
D: it requires the measurement of the pocket depth
Answer: D: it requires the measurement of the pocket depth 
Explanation: None