Please choose the correct ending to complete the given sentence: Health: [header] How to test for ketones [title] Take a sample. [step] You'll need a sample of whatever it is that you are wanting to test for ketones. If your sample is solid, you'll need to dissolve it.

Ending1: [substeps] To test your sample, scoop it out and use a soft whistle to carefully place a wire rim or metal bowl over the sample. Let it sit for a few seconds to dissolve the test chemical, then remove it, and re-test to see if the sample reacts with the testing powder. Ending2: Sample samples are available at most health food stores. Set the color of your saliva (blood) to the proper color. Ending3: To begin this process, dissolve the sample in water in which it is fresh; if it's solid, you won't get any ketones. [substeps] While you can find gels and some other good ulcer-friendly products at your local pharmacy, the fda policies can't guarantee results of ketones. Ending4: Do not use a solvent that contains a ketone group (e.g. acetone), or a solvent that will react with a ketone group.

Answer format: ending1/ending2/ending3/ending4