Please choose the correct solution to the question: How to clean a cast iron skillet safely.

Solution1: Sprinkle generous amount of sea salt to the skillet. Cut a raw potato in half. Scrub the skillet with the cut side of the potato. Rinse with water and dry with paper towel.

Solution2: Sprinkle generous amount of powder sugar to the skillet. Cut a raw potato in half. Scrub the skillet with the cut side of the potato. Rinse with water and dry with paper towel.

Answer format: solution1/solution2