This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Orthopaedics
[{'content': 'In Anterior dislocation of the shoulder which nerve is commonly affected \nSelect and explain. \nA. Ulnar nerve, B. Axillary nerve, C. Radial nerve, D. Median nerve', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The shoulder is the most frequently dislocated joint. It moves almost without restriction but pays the price of stability.\nThe shoulders integrity is maintained by the glenohumeral joint capsule, the cartilaginous glenoid labrum (which extends the shallow glenoid fossa), and muscles of the rotator cuff.\nAnterior dislocations occur in as many as 98% of cases.\nAnterior displacement of the humeral head is the most common dislocation seen by emergency physicians. Shoulders Pathology and Nerve Involved\nAn inferior shoulder dislocation is the least common form of shoulder dislocation.\nThe condition is also called luxatio erecta because the arm appears to be permanently held upward or behind the head, in fixed abduction.\nIt is caused by a hyper-abduction of the arm that forces the humeral head against the acromion', 'role': 'assistant'}]