Please choose the correct solution to the question: How can you make a floating shelf?

Solution1: Use a simple metal bookend (one that is a 360 degree angle only and metalic) Drill a pair of holes into one angle, screw to a wall and set books upon it.

Solution2: Use a simple metal bookend (one that is a 90 degree angle only and metalic) Drill a pair of holes into one angle, screw to a wall and set books upon it.

Answer format: solution1/solution2