This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper limb bones and muscles (proximal region) & Scapular movements, Subject name: Anatomy
Boundaries of quadrilateral space include all EXCEPT 
Select and explain. 
A. Teres major, B. Long head of triceps, C. Neck of humerus, D. Deltoid
D: Deltoid
Answer: D: Deltoid 
Explanation: The quadrangular space is bounded by superiorly teres minor inferior teres major medial triceps laterally humerus