Which of the following is a correctly matched pair?

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	$s.$ $Ray-fish$

Which one of the following is not a correct pair?

Given below are two statements:
Statement $I$: When any plane passing through the central axis of the body divides the organism into two identical halves, it is called radial symmetry.
Statement $II$: In phylum Echinodermata, both adults and larvae are radially symmetrical.
In the light of the above statements, choose the most appropriate answer from the options given below:

Based on the given figure showing cross-sections of animals,identify the correct classification for $a, b,$ and $c$ regarding their body cavity (coelom).

Which of the following groups contains only hermaphrodite (bisexual) animals?