Answer:
The most freely movable joint in the body is glenohumeral joint.
Step-by-step explanation:
The glenohumeral joint, also called the shoulder joint, is a mobile joint. It is formed by the union of the head of the humerus with the glenoid cavity of the scapula, an enarthrosis where a sphere fits into a concave surface, allowing a wide range of movement:
- Flexion.
- Extension.
- Abduction.
- Adduction.
- Internal rotation.
- External rotation.
The glenohumeral joint is the most mobile joint in the human body, allowing the upper limb to perform almost any activity.
The other options are not correct, because:
A and D. The tibio-femoral and elbow joints perform predominantly flexion and extension.
B. The coxal is the pelvic bone, whose joints with the sacrum and between right and left coxal are not mobile.