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': 'In the walking bleach technique: \nSelect and explain. \nA. It uses a heat treatment, B. It requires the patient to report in 24 hours, C. Can be done with 35 percent hydrogen peroxide, D. It uses a mixture of sodium perborate and hydrogen peroxide', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Hydrogen Peroxide can be used alone or mixed with sodium perborate into a paste for use in the “walking bleach technique”.\nRef :Grossman’s endodontics,13th edition, pg no:504', 'role': 'assistant'}]