Dicot stem has collenchymatous hypodermis, monocots have sclerenchymatous hypodermis. In each vascular bundle, the xylem and phloem are separated by a substance called vascular cambium. Eustele is similar to the dictyostele except that the bundles lack an endodermis and are collateral. Monocots have vascular bundles throughout their ground tissue, their stems do not have a discernible pith; the parenchyma cells in monocot stems are referred to simply as ground tissue. In monocot roots, the pericycle present only produces the lateral roots. So the correct option is 'Dicot stem i,ii,iii ; Monocot stem iv,v'.