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: 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: -        Boundaries of quadrilateral space

   Superior- Sub scapularis, Shoulder joint capsule and teres minor
   Medial- Long head of triceps
   Lateral- Surgical neck of humerus
   Inferior- Teres major
   Content- axillary nerve and posterior circumflex humeral vessels.