This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Shoulder and arm injuries, Subject name: Orthopaedics
[{'content': 'What is the finding seen on X-ray of the right shoulder \nSelect and explain. \nA. Farcture scapula, B. Farcture clavicle, C. Fracture dislocation of acromioclavicular joint, D. Fracture of the 1st rib', 'role': 'user'}, {'content': 'Answer: B \nExplanation: FRACTURE OF THE CLAVICLE: The junction of the middle and outer-third of the clavicle is the commonest site; the other common site being the outer-third of the clavicle. This fracture is usually displaced. The outer fragment displaces medially and downwards because of the gravity and pull by the pectoralis major muscle attached toit. The inner fragment displaces upwards because of the pull by the sternocleidomastoid muscle attached to it.Maheswari 5e pg: 107', 'role': 'assistant'}]