This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper limb, Subject name: Anatomy
[{'content': 'Anterior wall of axilla is formed by \nSelect and explain. \nA. Pectoralis major, B. Humerus, C. Latissimus dorsi, D. Teres major', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Anterior wall of axilla is formed by pectoralis major in front, clavipectoral fascia, and pectoralis minor. Upper pa of shaft of humerus in the region of bicipital groove forms a pa of lateral wall of axilla.Posterior wall of axilla is formed by latissimus dorsi below along with subscapularis and teres major.B D Chaurasia 7th edition Page no: 49', 'role': 'assistant'}]