Answer: Option B
:
B
A hingejointis a common class of synovialjointthat includes the ankle,elbow, andknee joints. Hingejointsare formed between two or more bones where the bones can only move along one axis to flex or extend.
An example of apivot jointin the human skeletal system is the rotation of the atlas around the axis.
Theshoulder jointis formed where the humerus (upper arm bone) fits into the scapula (shoulderblade), like a ball and socket.