In which of the following,the cortex,endodermis,pericycle,and pith are not clearly distinguishable?

Sclerenchymatous sheath is present in vascular bundles of:

In $Barley$ stem,vascular bundles are:

The transverse section of a plant material shows the following anatomical features under microscope $:-$
$(a)$ Collenchymatous hypodermis
$(b)$ Sclerenchymatous pericycle located just above phloem bundles in semi-lunar patches.
$(c)$ Vascular bundles are arranged in a ring.
$(d)$ Vascular bundles are conjoint & open.
Plant material should be :

Vessels are absent in this angiosperm.

The innermost layer of the cortex,which is also known as the starch sheath,is: