Which of the following is observed in the adult stage of $Cnidaria$ and $Echinodermata$?

Find out the incorrect match in the following options.

Match the following columns:

Column-$I$	Column-$II$
$I.$ Platyhelminthes	$p.$ Malpighian tubules
$II.$ Aschelminthes	$q.$ Renette cells
$III.$ Arthropoda	$r.$ Flame cells
$IV.$ Annelida	$s.$ Nephridia

Match the following columns and select the correct option.

Column-$I$	Column-$II$
$(a)$ Gregarious,polyphagous pest	$(i)$ Asterias
$(b)$ Adult with radial symmetry and larva with bilateral symmetry	$(ii)$ Scorpion
$(c)$ Book lungs	$(iii)$ Ctenoplana
$(d)$ Bioluminescence	$(iv)$ Locusta

$(a)\quad(b)\quad(c)\quad(d)$

Which one is not correctly matched?

Choose the correct option for the following statements:
$(i)$ Metamerism is a characteristic feature of $Annelida$ / $Arthropoda$.
$(ii)$ Internal buds in sponges are called $Gemmules$ / $Gemmi$.