Which of the following classifications is correct?

Distinguish the characteristics for Chondrichthyes (Cartilaginous fishes) and Osteichthyes (Bony fishes) from the following list:
$I$ - Air bladder absent,$II$ - Operculum absent,$III$ - Cycloid or ctenoid scales,$IV$ - Placoid scales,$V$ - Ventral mouth,$VI$ - Terminal mouth,$VII$ - Internal fertilization,$VIII$ - External fertilization.
Select the correct grouping for Chondrichthyes and Osteichthyes respectively.

Radial symmetry is not found in

Match the following columns:

Column-$I$	Column-$II$
$I.$ Skin without scales	$p.$ $Catla$
$II.$ Placoid scales	$q.$ $Hagfish$
$III.$ Cycloid scales	$r.$ $Chameleon$
$IV.$ Epidermal scales	$s.$ $Ray-fish$

Select the correct match for Column $X$ and Column $Y$:

Column $X$	Column $Y$
$(1)$ Aves	$(A)$ Endoskeleton made of cartilage
$(2)$ Amphibia	$(B)$ Left aortic arch
$(3)$ Chondrichthyes	$(C)$ First homeothermic animals
$(4)$ Mammalia	$(D)$ Metamorphosis

In which of the following sets,are the groups not correctly matched phylum-wise?