Periderm is produced by:

A) xylem.
B) cork cambium.
C) pith.
D) cortex.
E) phloem.

Cork Cambium

Cork cambium is a layer of meristematic tissue in plants that produces cork cells to protect and waterproof the plant.

Periderm

The outer protective layer of a plant's bark, produced as part of secondary growth, replacing the epidermis in mature plant stems and roots.

Xylem

The vascular tissue in plants responsible for the conduction of water and nutrients from the roots to the leaves.