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

Which of the following is an incorrect pair?

Which of the following forms contain algae?

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

In bryophytes and pteridophytes,transport of male gametes requires

Read carefully the following statements:
$I.$ Funaria possesses unicellular and unbranched rhizoids.
$II.$ Gemmae are asexual buds, which originate from small receptacles called gemma cups.
$III.$ The Sphagnum plants have a magnificent property of retaining water.
$IV.$ Mosses along with lichens are the first organisms to colonise rocks.
Which of the statements given above are correct?