Which pair of animals are not included in mammals?

Match the following:

List-$I$	List-$II$
$(a)$ Physalia	$(i)$ Pearl oyster
$(b)$ Limulus	$(ii)$ Portuguese Man of War
$(c)$ Ancylostoma	$(iii)$ Living fossil
$(d)$ Pinctada	$(iv)$ Hookworm

Choose the correct answer from the options given below.

Consider the following statements:
$A$. Annelids are true coelomates
$B$. Poriferans are pseudocoelomates
$C$. Aschelminthes are acoelomates
$D$. Platyhelminthes are pseudocoelomates
Choose the correct answer from the options given below:

Differentiate between Phylum Platyhelminthes and Phylum Aschelminthes.

The branch of science dealing with the study of birds is

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	$s.$ $Ray-fish$