Name the zone of parenchyma which is present at the center of the sunflower stem.
Parenchyma:
The anatomical feature which can be associated with maize and sunflower stem is
(a)Collenchymatous hypodermis
(b)Conjoint and collateral vascular bundles
(c)Presence of water cavity
(d)Presence of phloem parenchyma
Name the regions in which parenchyma tissue is present.