The Two Agents Most Commonly Used for Tooth Whitening Are

The two agents most commonly used for tooth whitening are hydrogen peroxide and carbamide peroxide.The key difference between professional and over-the-counter whitening products is the concentration of the active ingredients.

A) Both statements are true.
B) Both statements are false.
C) The first statement is true; the second is false.
D) The first statement is false; the second is true.