The giant algae or seaweeds belong to which class?

The cell wall of algae is composed of which of the following?

Match the following columns:

Column-$I$	Column-$II$
$P$. Oogamous	$I$. Spirogyra,Chlamydomonas
$Q$. Anisogamous	$II$. Volvox,Fucus
$R$. Isogamous	$III$. Some species of Chlamydomonas

Some characters of algae are given below:
$a.$ Floridean starch
$b.$ Sulphated phycocolloids in cell wall
$c.$ Alginic acid
$d.$ Trumpet hypha
$e.$ Haplodiplontic life cycle
$f.$ Isomorphic alternation of generation
$g.$ Fucoxanthin
$h.$ Phycoerythrin
$i.$ Zygotic meiosis
$j.$ Two anterior flagella
Which of the given set of characters belongs to $Laminaria$?

Which of the following is obtained from algae?

Select the correct option by matching Column-$I$ with Column-$II$.

Column-$I$	Column-$II$
$(A)$ Blue-green algae	$(p)$ Chlamydomonas
$(B)$ Unicellular algae	$(q)$ Spirogyra
$(C)$ Filamentous algae	$(r)$ Volvox
$(D)$ Colonial algae	$(s)$ Nostoc