One of the following is correct sequence for hierarchy of organisational complexity.A. ParenchymaB. XylemC. Vascular bundleD. Stele

Parenchyma is group of cells. Xylem is a group of tissues formed by parenchyma, sclerenchyma and tracheary elements. Vascular bundle is formed by both xylem and phloem. Stele has vascular bundles, pericycle, medulla and medullary rays or conjunctive tissue.