This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper Extremity, Subject name: Anatomy
Coracoacromial ligament resists which movements? 
Select and explain. 
A. Upward displacement of humeral head, B. Abduction of shoulder, C. Inferior displacement of humerus, D. External rotation
A: Upward displacement of humeral head
Answer: A: Upward displacement of humeral head 
Explanation: Ans. is 'a' i.e., Upward displacement of humeral head * The coracoacromial ligament is a flat triangular band that plays a supportive role for the shoulder joint.* Coracoacromial prevents Upward displacement of humeral head.