The posterior terminal part of the vertebral column in humans and other tailless apes is known as:

Human vertebral column is formed by

Twelve pairs of ribs and twelve pairs of cranial nerves are found in

Breast bone is also called

Read the following Assertion $(A)$ and Reason $(R)$ and choose the correct option.
Assertion $(A):$ All $12$ pairs of ribs are called bicephalic.
Reason $(R):$ Each rib is connected dorsally to the vertebral column by $2$ heads of articulation.

In which bone is the bony cavity known as $Sella$ $Turcica$ formed?