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': 'periochip is made up of: \nSelect and explain. \nA. Glutaraldehyde, B. Glycerine and water, C. 2.5 mg of chlorhexidine, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]