Finish the following sentence with the best choice: How to remove stains from teeth

Choices:
- 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.
- 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:
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.