Question

whats the only point of attachment of the upper extremity to the axial skeleton? a) glenohumeral joint b) acromioclavicular joint c) scapulocostal articulation d) sternoclavicular joint

Explanation:

The sternoclavicular joint is the only articulation between the upper extremity (clavicle) and the axial skeleton (sternum). The glenohumeral joint connects the humerus to the scapula (both part of the appendicular skeleton). The acromioclavicular joint connects the clavicle to the scapula (both part of the appendicular skeleton). The scapulocostal "articulation" is not a true joint but a functional relationship between the scapula and rib - cage (scapula is part of appendicular skeleton, rib - cage is axial).

Answer:

d) Sternoclavicular joint