The cervical vertebra called axis provides head with sideways rotation. This can be because
It is articulated to skull through occipital condyles
It is fused with 1st vertebra atlas
It is joined through elastic pads of fibrocartilage with other vertebrae, which provide mobility
It contains odontoid process that fits into the odontoid canal of atlas
As we learn
vertebra -
Each vertebra has a central hollow portion (neural canal) through which the spinal cord passes.
- wherein
First vertebra is the atlas and it articulates with the occipital condyles.
Correct option is 4