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: Unknown
The commonest cause of recurrent shoulder dislocation is - 
Select and explain. 
A. Shallow glenoid labrum, B. Bankart's lesion, C. The weakness of subscapularis muscle, D. Injury to humeral head
B: Bankart's lesion
Answer: B: Bankart's lesion 
Explanation: Ans-B