A) endarch, collateral and tri-to pentarch
B) exarch, polyarch and radial
C) endarch, polyarch and radial
D) collateral, exarch and polyarch.
Correct Answer: B
Solution :
: In monocot roots the vascular bundles are closed (no cambium in present between xylem and phloem), polyarch (many in number), radial (xylein and phloem strands are present at different radii, arranged in a ring), exarch (protoxylem lies towards the epidermis and metaxylem towards the centre). The parenchyma is present in between the xylem and phloem bundles.
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