This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to use salt around the house
Sprinkle salt on spills.
It will absorb the liquid from coffee, tea or wine spills, making it easier to remove the stains.
Mix a little salt with vinegar to clean your hands after you've handled raw onions to remove the odor of the onions.

Available options:
1). Scrub your hands well with a lemon to remove the dirt and loose skin from your hands. You will never like it, but after cleaning your hands it will be inevitable to wash them more often.
2). This solution will also remove food stains from your hands, such as beet juice or food colorings. Use salt to clean your cast iron pans.
3). Contact your vet for an additional solution if you have acid in your system, especially if you're experiencing nausea. Take 1 teaspoon of lemon juice and 1 tablespoon of baking soda into two bowls.
4). Submerge a cotton ball in vinegar and put a small amount of salt on a cloth, the cloth will stick. Rub the vinegar residue away using the soaked cloth.
The answer is:
2).