A vascular bundle having both xylem and phloem are arranged in an alternate manner with different radii is known as:

The correct answer is Radial

Explanation:

Radial Vascular Bundles: In this arrangement, the xylem and phloem are separated from each other and are arranged alternately along different radii.

• A common example of plants with radial vascular bundles could be seen in roots where the xylem and phloem are arranged in different sectors.
• In the cross-section of a root with a radial arrangement, you might see several "arms" of the xylem alternating with "arms" of the phloem, making a star-shaped pattern in some species.

Conjoint Vascular Bundles: In this arrangement, the phloem and xylem are situated next to each other on the same radius, typically with the phloem located on the exterior (toward the stem surface) and the xylem on the interior. This is the most common type of structural organization in stems and leaves of angiosperms (flowering plants).

When the xylem is surrounded by phloem or phloem is surrounded by xylem, such vascular bundles are known as "Concentric" vascular bundles.