Please choose the correct solution to the question: To remove rust from drill bits

Solution1: scrub off the rust using a scrub brush or cotton ball.  Soak the drill bits in vinegar.  Wipe off remaining rust.

Solution2: scrub off the rust using a scrub brush or scouring pad. Soak the drill bits in vinegar. Wipe off any remaining rust.

Answer format: solution1/solution2