The sporophyte is subsidiary and parasitic on the gametophyte in

The largest bryophyte is

Consider the following statements:
$X:$ Rothmaler divided Bryophyta into three classes.
$Y:$ Iyengar is considered the father of Indian Bryology.
$Z:$ Shiv Ram Kashyap is considered the father of Phycology.

The sporophyte of $Riccia$ contains:

In bryophytes,fertilization occurs in .........

Describe the reproduction in Liverworts.