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

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 $R$?

What is the body cavity found between the alimentary canal and the body wall of animals called?

Using appropriate examples,differentiate between false and true body segmentation.

The following diagram represents which type of symmetry?

When the body of an animal can be divided into two identical left and right halves through a single plane along the central axis,it is called ....... symmetry.