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
[{'content': 'All of the following structures forms the boundaries of the quadrangular space which is present under the deltoid muscle in the shoulder region, from the posterior side, EXCEPT: \nSelect and explain. \nA. Teres minor, B. Teres major, C. Surgical neck of humerus, D. Long head of biceps brachii', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Structures forming the boundaries of the quadrangular space from the posterior side are:Superiorly by teres minorInferiorly by teres majorLaterally by surgical neck of humerusMedially by long head of triceps brachiiContents of the quadrangular space are:Axillary nervePosterior circumflex humeral vesselsSagging pa of shoulder joint capsuleRef: Clinical Anatomy: (a Problem Solving Approach) By Kulkarni page 110.', 'role': 'assistant'}]