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
Recurrent dislocation of shoulder occurs, because of 
Select and explain. 
A. Incomplete labrum, B. Superadded secondary infection, C. Crushed glenoidal labrum, D. Weak posterior capsule
C: Crushed glenoidal labrum
Answer: C: Crushed glenoidal labrum 
Explanation: C i.e. Crushed glenoid labrum,