In which of the following are cleidoic eggs found?

Match the following columns and select the correct option.

Column-$I$	Column-$II$
$(a.)$ Sea fan	$(i)$ Mandarina
$(b.)$ Sea hare	$(ii)$ Taenia
$(c.)$ Radial symmetry	$(iii)$ Gorgonia
$(d.)$ Endoparasite	$(iv)$ Aplysia

How many classes are present in Gnathostomata?

List the phyla in the correct order of their placement in classification:
$I$. Chordata
$II$. Annelida
$III$. Arthropoda
$IV$. Platyhelminthes
$V$. Ctenophora
$VI$. Aschelminthes

How many of the following animals exhibit bilateral symmetry,are triploblastic,and possess a true coelom?
Sepia,Loligo,Sea anemone,Balanoglossus,Dentalium,Sea lily,Chiton,Pearl oyster,Starfish

Features common to the animals belonging to class-$Amphibia$ and class-$Reptilia$ are