Vascular bundles occur in a ring in
A.Monocot stem – scattered vascular bundles are present.
B.Leaf – a single vascular bundle is present in the mesophyll.
C.Root – xylem and phloem strands are present on different radii.
D.Dicot stem – vascular bundles are present in the form of ring.
So, the correct answer is ‘Dicot stem’