This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pectoral Region, Axilla & Brachial Plexus, Subject name: Anatomy
Posterior wall of axilla is formed by all EXCEPT: 
Select and explain. 
A. Teres major, B. Subscapularis, C. Supraspinatus, D. Latissimus dorsi
C: Supraspinatus
Answer: C: Supraspinatus 
Explanation: Ans. (c) SupraspinatusRef: BDC 6th ed. vol. I/47; Gray's Anatomy, 39th ed/ 841 Boundaries of Axilla* ANTERIOR WALL: Pectoralis major, Pectoralis minor, Clavipectoral fascia* POSTERIOR WALL: Subscapularis, Teres major, Latissimus dorsi* MEDIAL WALL: first 4 ribs & their associated intercostals muscles, Serratus anterior* LATERAL WALL: Intertubercular (bicipital groove), Biceps tendon.