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 plaque indices does not use a disclosing agent? \nSelect and explain. \nA. 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.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]