Please choose the correct solution to the question: How to wash hands in the sink.

Solution1: Wet hands with water, rub and lather hands with soap for at least 20 seconds, rinse then dry with towel.

Solution2: Wet hands with vinegar, rub and lather hands with soap for at least 20 seconds, rinse then dry with towel.

Answer format: solution1/solution2
Answer: solution1