Please choose the correct solution to the question: How can you use banana peels on your teeth?

Solution1: Simply peel a ripe banana, and rub your teeth with the insides of the peel for about two minutes. After three weeks, your teeth will have whitened. Banana peel can act as a gentle exfoliator for your teeth.

Solution2: Simply peel a ripe banana, and rub your teeth with the outside of the peel for about two minutes. After three weeks, your teeth will have whitened. Banana peel can act as a gentle exfoliator for your teeth.

Answer format: solution1/solution2