The blood enters from the right and exits through the left!
5/6, and 3/4, five over six because 3/6 is equal to 1/2, 5>3, three over four because 2/4 is equal to 1/2, and 3>2
Though I'd only recommend an increase of handywork and skill, Out of the options above, i'd choose to use dull knives.
Calcitonin injection.
Calcitonin is a natural hormone that comes from the thyroid, and slows osteoclasts rate of absorption of bone.