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
In the walking bleach technique: 
Select and explain. 
A. 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
D: It uses a mixture of sodium perborate and hydrogen peroxide
Answer: D: It uses a mixture of sodium perborate and hydrogen peroxide 
Explanation: Hydrogen Peroxide can be used alone or mixed with sodium perborate into a paste for use in the “walking bleach technique”.
Ref :Grossman’s endodontics,13th edition, pg no:504