What does the given figure represent?

Match the following columns:

Column-$I$	Column-$II$
$P$. Cellular level of organization	$I$. Cnidaria,Ctenophora
$Q$. Tissue level of organization	$II$. Porifera
$R$. Organ level of organization	$III$. Aschelminthes to Chordata
$S$. Organ system level of organization	$IV$. Platyhelminthes

Assertion $A$: Annelids and Arthropods exhibit bilateral symmetry.
Reason $R$: In Annelids and Arthropods,the animal body is divided into equal parts along radial directions.
Which option is correct for Assertion $A$ and Reason $R$?

Organisms attached to a substratum generally possess:

Describe the different types of symmetry in animals.

In the given figure,what do '$A$' and '$C$' represent respectively?