Please choose the correct solution to the question: To unclog a sink drain using boiling water,

Solution1: combine salt and baking soda and put it down the drain, use the stove to boil some water in a tea kettle and then pour it down the drain, then flush the drain with water from the faucet.

Solution2: combine salt and baking soda and put it down the drain, use the stove to boil some water in a teaspoon and then pour it down the drain, then flush the drain with water from the faucet.

Answer format: solution1/solution2