The cross section of a plant material shows the following anatomical featrues under microscope:
(a) Sclerenchymatous bundle sheath
(b) Many vascular bundles are scattered in parenchymatous ground tissues, each vascular bundle is surrounded by sclerenchymatous bundle sheath.
(c) Vascular bundles are usually oval shaped.
(d) Vascular bundles are conjoint, collateral & closed and xylem is endarch
(e) Phloem parenchyma is absent and water containing cavities are present within the vascular bundles:
The plant material should be:

Answer

Monocotyledonae stem