Which one of the following is well-developed in hydrophytes?

The waxy substance secreted by epidermal cells on their outer walls is:

Articulated laticifers or latex vessels are prominent in

Nucleus is absent in

Select the correct option for the following statements:
$(i)$ The vessel element is made up of cells arranged one above the other.
$(ii)$ When xylem and phloem are arranged together on the same radius,it is called a conjoint/radial vascular bundle.

Which xylem element is living?