Free Edge is the part of the nail that can be filed and shaped. It is an extension of the nail plate that overlaps the hyponychium. So, the correct option is B.
The hyponychium may be defined as the skin just under the free edge of your nail. It is also referred to as the Perionychium.
The free edge of the nail is the part of the lamina that protrudes from the nail bed. This part of the nail is usually dead and painless. Because it contains dead cells.
Therefore, Free Edge is the part of the nail that can be filed and shaped. It is an extension of the nail plate that overlaps the hyponychium.
To learn more about Nail structure, refer to the link:
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