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: Surgery
[{'content': "Banka's lesion involves \nSelect and explain. \nA. Anterior aspect of the head of humerus, B. Anterior aspect of glenoid labrum, C. Posterior aspect of glenoid labrum, D. Posterior aspect of head of humerus", 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Anterior aspect of glenoid labrum', 'role': 'assistant'}]