Question: How to remove stains from teeth
Option 0: Mix 1 tablespoon of baking soda with 2 tablespoons of water to make a past, brush teeth a few times a week with this paste.
Option 1: Mix 1 tablespoon of baking soda with 2 tablespoons of hydrogen peroxide to make a past, brush teeth a few times a week with this paste.
Answer: 1