Into how many groups are seedless plants divided?

Assertion : Like pteridophytes,sporophyte is a dominant phase in gymnosperms.
Reason : The gametophyte stages are independent in the pteridophytes.

How many categories does the sub-class '$A$-da' (or '$A$-dae') contain?

What was the main merit of the Bentham and Hooker classification system?

Which one is a wrong statement?

Read the following statements and answer the question which follows them:
$(1)$ In liverworts,mosses,and ferns,gametophytes are free-living.
$(2)$ Gymnosperms and some ferns are heterosporous.
$(3)$ Sexual reproduction in $Fucus$,$Volvox$,and $Albugo$ is oogamous.
$(4)$ The sporophyte in liverworts is more elaborate than that in mosses.
$(5)$ Both $Pinus$ and $Marchantia$ are dioecious.
How many of the above statements are correct?