The composition of stele is (A) Pith, vascular bundles (B) Endodermis, pericycle, pith (C) Endodermis, pericycle (D) Pericycle, pith

The stele, also known as the vascular cylinder, is a central part of the plant root or stem. It primarily contains vascular tissues, including xylem and phloem, and other supporting structures. The composition of the stele typically includes the following layers:

Endodermis: This is a cylindrical layer of cells surrounding the stele. It acts as a selective barrier to control the movement of water and solutes from the cortex into the stele.

Pericycle: This layer of cells is just inside the endodermis and surrounds the vascular tissue. It can give rise to lateral roots and secondary growth in some plants.

Vascular tissues (xylem and phloem): These are the transport tissues responsible for moving water, nutrients, and sugars throughout the plant. Xylem typically occupies a central position, with phloem surrounding it.

Pith: In some plants, there is a central region of the stele called pith, composed of parenchyma cells. It may not be present in all plant roots.

Based on these components, the most complete answer is (C) Endodermis, pericycle, pith. This includes the essential layers of the stele: endodermis surrounding the pericycle and vascular tissues, which may include pith in some plants