This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Back, Deltoid, and Scapular Region, Subject name: Anatomy
Boundaries of quadrilateral space include all except- 
Select and explain. 
A. Teres major, B. Long head of triceps, C. Neck ofhumerus, D. Deltoid
D: Deltoid
Answer: D: Deltoid 
Explanation: Ans. is "d" i.e., DeltoidSpacesBoundariesContentsQuadrangularSuperior--Subscapularis,Capsule of shoulder joint, Teres minorAxiltaryr nervePosterior circumflex humeral vesselsInferior --Medial --Lateral --Teres majorLong head of tricepsSurgical neck of humerusUpper triangularMedial -- Teres minorLateral -- Long h ead of tricepsInferior -- Teres majorCircumflex scapular arteryLower triangularMedial -- Long head of tricepsLateral -- Medial border of humerusSuperior-- Teres majorRadial nerveProfunda brachii vessels