The tongue bone is known as:

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.

The axis vertebra of a mammal differs from the atlas in:

Which of the following statements is correct regarding the human body?

Cervical vertebrae differ from other vertebrae in having -

Coccygeal bone is formed by the fusion of ......... bones in man.