Please choose the correct solution to the question: To rub scratches out of  a pair of sunglasses.

Solution1: Apply a small amount of toothpaste on a soft cloth and then rub it into the sunglasses. Rinse with water.

Solution2: Apply a small amount of toothpaste on a soft cloth and then rub it into the sunglasses. Rinse with soda.

Answer format: solution1/solution2
Answer: solution1