Which of the following pteridophytes is heterosporous in nature?

How many types of sporophylls are found in Pteridophytes?

Which of the following is incorrect?

What is the nature of the gametophytic stage in Pteridophytes?

$Selaginella$ is heterosporous. It produces two types of spores. The microspore develops into microgametophyte and the megaspore develops into megagametophyte. With respect to gametophyte,which one statement is correct?

Which of the following statements is correct?