A is the cortex. It is that part of the plant that protect the pith. B is the epiblema which is also known as the epidermis which is the outermost layer of protective cells in a root. C is the pith as it is the central part of a plant root. D is the endodermis as this is that part of the plant root that forms the border between the innermost cells of the root from the cortex. E are the root hairs that are the extensions of the roots arising from the epidermis. F is pericycle, the portion that forms a separation between the xylem and phloem. Thus, the correct order is as follows cortex, epiblema, pith, endodermis, root hairs and pericycle.
Thus, the correct answer is option D.