A physician confirmed a patient's shoulder dislocation by examining his X-ray. What did the physician find on the X-ray that prompted this confirmation?

Displacement of the head of humerus from the glenoid cavity of the clavicle.

Displacement of the head of humerus from the glenoid cavity of the scapula.

Displacement of the radial head from its normal articulation with the ulna and the humerus.

Displacement of the ulnar head from its normal articulation with the radius and the humerus.Displacement of the ulnar head from its normal articulation with the radius and the humerus.