Please choose the correct ending to complete the given sentence: Health: [header] How to disinfect a wound [title] Wash your hands. [step] Soap and water are all you need. Work up a good lather.

Ending1: This can be achieved with ordinary soap or by scrubbing with a cotton-bristled toothbrush. Blot all the soap out of your wound. Ending2: If using alcohol, dilute it with warm water. Wipe down your hands with soap or a clean towel. Ending3: Then soak the injured area in the wash mixture or use a sterile cotton ball. Rub a small amount of the mixture over the wound, which should help clean it and prevent a blood clot from forming. Ending4: Then, rub your hands together long enough to sing the " happy birthday " song. Make sure you get the backs of your hands, fingertips, and under your fingernails, if possible.

Answer format: ending1/ending2/ending3/ending4