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 plaque indices does not use a disclosing agent? 
Select and explain. 
A. Plaque component of periodontal disease index, B. Debris component of simplified Oral Hygiene Index, C. Modified Quigley Hein Plaque Index, D. All of the above.
B: Debris component of simplified Oral Hygiene Index
Answer: B: Debris component of simplified Oral Hygiene Index 
Explanation: None