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': "Bankart's lesion is seen at - \nSelect and explain. \nA. Post surface of glenoid labrum, B. Anterior surface of glenoid labrum, C. Anterior part of head of humerus, D. Post part of head of humerus", 'role': 'user'}, {'content': "Answer: B \nExplanation: When the labrum of the shoulder joint is torn, the stability of the shoulder joint is compromised.\nA Specific type of labral tear is called a Bankart's lesion.\nA Bankart's lesion occurs when an individual sustains an anterior dislocation.\nAs the shoulder pops out of the joint, it often causes a tear of the labrum and stripping of periosteum from the anterior surface (more specifically anteroinferior) of glenoid.\nIn severe injuries, there may be avulsion of a piece of bone from the antero-inferior glenoid rim, called bony Bankart lesion.", 'role': 'assistant'}]