The gametophytic generation in pteridophytes is commonly called

While entering the neck of a fern archegonium,sperms show:

The evolutionary advanced features of $Selaginella$ are:
$(a)$ Heterospory
$(b)$ Endosporic development of gametophyte
$(c)$ Reduced gametophyte
$(d)$ Localization of sporangium-bearing appendages in strobili
$(e)$ Unisexual gametophytes
$(f)$ Fertilization with the help of water

What type of spores are produced by the plant shown in the given figure?

Identify the pteridophyte from the given options.

What type of sporophylls are found in Pteridophytes?