Dicotyledonous and monocotyledonous plants are included in which group?

Which of the following is considered more evolved?

Assertion $(A)$: Hibiscus is called an angiosperm.
Reason $(R)$: In Hibiscus,the ovules are enclosed and covered by the ovary.

What is the characteristic of the plant shown in the figure?

What is the size of the smallest angiosperm (in $mm$)?

To which group does the plant shown in the given figure belong?