In bryophytes,the sporophyte stage is responsible for which of the following?

The function of elaters is

Choose the correct statements for the sporophyte of bryophytes:
$I$. The sporophyte is multicellular,not free-living,but attached to the gametophyte for nourishment.
$II$. Some cells of the sporophyte undergo meiosis to produce haploid spores.
$III$. These spores germinate to produce the gametophyte.

In moss,the medulla has:

Identify the plants $A$ and $B$ in the figures given below.

Which of the following is a bryophyte?