Answer:
The correct answer will be option-D
Explanation:
The meristems are the metabolically active cells which have the ability to divide continuously and form the special tissues of the plants.
In stems, the meristem which gives rise to the vascular tissues is called the "procambium". The procambium is the meristematic tissue which provides the primary tissue of the vascular system of the plants which forms the cylinder of the cambium proper which produces the mature roots and stems.
Thus, option-D is the correct answer.