The correct option is D Meristmatic
In grafting, we join two plants to each other. The upper part of the graft is called scion that forms the top portion of the plant, and the lower part which we call understock makes roots or part of the stem. Cambium tissue is a meristematic tissue, which is present in the vascular bundles of the dicot plants. This tissue has a regeneration capacity due to which it can form new tissue at the time of grafting. Thus, the correct answer is option B.