Which combination of tissues acts together to provide support to the hypocotyl of a seedling?

$I.$ Made up of sclerenchymatous cells
$II.$ Generally absent in primary phloem
$III.$ Much elongated and pointed
Given above characters belong to which of the following?

Assertion: In angiosperms,the conduction of water is more efficient because their xylem has vessels.
Reason: Conduction of water by vessel elements is an active process with energy supplied by xylem parenchyma rich in mitochondria.

In sclerenchymatous cells,the lignin deposition:

While eating peach or pear,it is usually seen that some stone-like structures get entangled in the teeth. What are these stone-like structures called?

Laticiferous cells usually contain