Please choose the correct solution to the question: Shampoo hair without water.

Solution1: Mix 1/4 cup of baby oil and 1/4 of baking soda, massage into hair. Brush out after a few minutes.

Solution2: Mix 1/4 cup of baby powder and 1/4 of baking soda, massage into hair. Brush out after a few minutes.

Answer format: solution1/solution2
Answer: solution2