Antherozoids of fern are

In $Pteris$,the sori are

In $Lycopodium$,the antherozoids are .......

How many structures listed below are diploid $(2n)$ for a typical fern member?
$a.$ Indusium cell
$b.$ Stomium cell
$c.$ $NCC$ (Neck Canal Cell)
$d.$ Rhizome cell
$e.$ Sporophyll cell
$f.$ Prothallus cell
$g.$ $SMC$ (Spore Mother Cell)
$h.$ Spore
$i.$ Antherozoid mother cell

Adaxial outgrowth from the base of leaves in $Selaginella$ is called:

Disposal of spores in ferns takes place through