Mark the odd member from the following:

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 invertebrate phylum is characterized by the ability of regeneration?

Cleidoic eggs are a characteristic feature of which of the following?

Match the following columns and select the correct option.
Column $-I$ | Column $-II$
$(a)$ $6-15$ pairs of gill slits | $(i)$ Trygon
$(b)$ Heterocercal caudal fin | $(ii)$ Cyclostomes
$(c)$ Air Bladder | $(iii)$ Chondrichthyes
$(d)$ Poison sting | $(iv)$ Osteichthyes

To which family do pigeons and doves belong?