Vascular bundles are conjoint,collateral,endarch and lack cambium between xylem and phloem in all,but not in:

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 :

In which of the following are radial vascular bundles and conjoint vascular bundles found,respectively?

In the stem of maize $(Zea \ mays)$,the vascular bundles are ........... .

The number of cambial strands in the vascular bundle of $Cucurbita$ is:

In the stem of $Cucurbita$,the vascular bundles are .......