The correct option is(2) Vascular cambium
Explanation:
Secondary vascular tissues, i.e., secondary xylem and phloem are formed by the vascular cambium. It is produced by two types of meristems; fascicular or intrafascicular and interfascicular cambium. Intrafascicular cambium is a primary meristem which occurs as strips in vascular bundles.
It divides to form secondary phloem on outer side and secondary xylem on the inner side. Interfascicular cambium arises secondarily from the cells of medullary rays.
Phellogen or cork cambium is produced in the outer cortical cells of dicot stems. lt is helpful in increasing the girth. Apical meristems are present at the tips of stem, root and their branches. They are responsible for the or increase in length of the plant, Axillary meristem is found in axillary Luds. These cells are ieft behind from ***** apical meristem during the formation of leaves and elongation of stems.
