<prompt> Which is the preferred material for use to sharpen a dental instrument to be used for tooth preparation?Arkansas stoneSilicon carbideAluminium oxideDiamond  <response>: Arkansas stone is a naturally occurring mineral containing microcrystalline quartz and traditionally has been the preferred material for fine sharpening stones. Only a fine grit stone is suitable for the final sharpening of dental instruments to be used for tooth preparation.Ref: Sturdevants art and science of operative dentistry. 4th edition page 317 