$Monocystis$ belongs to the order:

Which of the following fundamental features is common to $Balanoglossus$,$Anopheles$,and $Laccifer$ without any exception?

Which kingdom consists of organisms that are multicellular,aquatic or terrestrial,heterotrophic,and eukaryotic?

Choose the correct option for the following statements:
$(i)$ Birds are oviparous / viviparous animals showing internal fertilization.
$(ii)$ In cartilaginous fishes,gill slits are without operculum / with operculum.

Match the animals in Column $I$ with their respective classes in Column $II$ and choose the correct answer.

Column $I$	Column $II$
$A$. Aptenodytes	$p$. Aves
$B$. Hemidactylus	$s$. Reptilia
$C$. Carcharodon	$q$. Chondrichthyes
$D$. Pteropus	$r$. Mammalia

Select the code for the correct answer from the options given below.

Consider the following features:
$(a)$ Organ system level of organisation
$(b)$ Bilateral symmetry
$(c)$ True coelomates with segmentation of body
Select the correct option of animal groups which possess all the above characteristics.