Which of the following is included in the class $Sphenopsida$?

Which of the following is a homosporous pteridophyte?

Sporangia are associated with sporophylls. In $P$ plants,sporophylls are distinct,while in $Q$ plants,sporophylls form compact structures called strobili or cones.
$P \quad Q$

In $Selaginella$,the adaxial outgrowth,from the base of the leaf,is called:

Read carefully the following statements about sexual reproduction in ferns:
$I.$ Water is essential for fertilization.
$II.$ The male gametophyte bears antheridia,while the female gametophyte bears archegonia,which produce antherozoids and egg cells,respectively.
$III.$ Antherozoids and egg cells fuse to give rise to a zygote. The zygote develops into a young embryo. The embryo gives rise to a sporophyte.
Which of the statements given above are correct?

In $Selaginella$,when the sporophyte develops directly from the female gametophyte other than the oosphere,the condition is called: