The movement at the following joint permits a person to look towards the right or left -: (A) Atlanto - occipital joint, (B) Atlanto - Axial joint, (C) C2-C3 joint, (D) C3-C4 joint
Answer is B. Atlanto - occipital (between the skull and C1) joint permit nodding of the head (as when indicating approval or yes) and Atlanto-axial joint permits the head to be turned from side to side i.e. rotation (as indicating disapproval, the no movement).