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 is seen at \nSelect and explain. \nA. Post surface of glenoid labrum, B. Ant surface of glenoid labrum, C. Ant pa of head of humerus, D. Post pa of head of humerus", 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Anterior surface of glenoid labrum', 'role': 'assistant'}]