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?

• A. Displacement of the head of humerus from the glenoid cavity of the clavicle.
• B. Displacement of the head of humerus from the glenoid cavity of the scapula.
• C. Displacement of the radial head from its normal articulation with the ulna and the humerus.
• D. 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.