Into how many groups are the Thallophytes divided?

Which of the following is not included in the group of cryptogams (non-flowering plants)?

Arrange the following examples from their simple to complex form in ascending order.
$(1)$ Equisetum $(2)$ Chlamydomonas $(3)$ Sphagnum

$A$ living fossil is .......

What is the shape of an apical cell in the gametophytes of bryophytes and pteridophytes?

Assertion $(A)$: In $Volvox$,the zygote undergoes meiosis to form four haploid cells before germination.
Reason $(R)$: $Volvox$ exhibits a haplontic life cycle.