$12$ pairs of cranial nerves are present in

Which of the following phyla is correctly matched with its two general characteristics?

Column-$I$ contains larval stages and column-$II$ contains the groups to which they belong. Match them correctly and choose the right answer.

Column-$I$	Column-$II$
$A$. Planula	$1$. Coelenterata
$B$. Tornaria	$2$. Hemichordata
$C$. Trochophore	$3$. Annelida
$D$. Bipinnaria	$4$. Echinodermata
$E$. Glochidium	$5$. Mollusca

Which of the following organisms exhibit either internal or external fertilization?

Match the following genera with their respective phylum:

$(a)$ Ophiura	$(i)$ Mollusca
$(b)$ Physalia	$(ii)$ Platyhelminthes
$(c)$ Pinctada	$(iii)$ Echinodermata
$(d)$ Planaria	$(iv)$ Coelenterata

Select the correct option:

Match the following animals with their respective phyla and arrange them in the correct order as per the given list of animals: Animals: $Leucosolenia$,$Opalina$,$Planaria$,$Wuchereria$. Phyla: $Aschelminthes$,$Protozoa$,$Porifera$,$Platyhelminthes$.