12. A tool used to scrub the dry skin of the foot. a. Foot Brush c. Pumice Stone b. Foot File d. Callous Remover 13. It is a vertical splitting or separation of the nail plate layers at the distal (free) edge of the nail plate a. Blue nails c. Bruised nails b. Brittles nails d. Eggshell nails 14. It is bluish in color, may be attributed to poor blood circulation or heart disorder. a. Blue nails c. Bruised nails b. Brittles nails d. Eggshell nails 15. White spot appears frequently in the nails. They may be caused by injury to the base of the nail a. Onychia c. Leconychia b. Onychogryphosis d. Onychophagy 16. It pertains to extreme thickening curvature of the nails, usually it is caused by varying degree of hyperkeratosis a. Onychia c. Leconychia b. Onychogryphosis d. Onychophagy 17. Which of the following is NOT a nail shape? a. Round c. rectangle b. Square d. oval 18. Which of the following is the most famous among the nail shapes? a. Round c. squoval b. Square d. oval