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
Most common joint to undergo recurrent dislocation is : 
Select and explain. 
A. Shoulder joint, B. Patella, C. Knee joint, D. Hip joint
A: Shoulder joint
Answer: A: Shoulder joint 
Explanation: A i.e. Shoulder