<prompt> Which of the following is not a pa of chest wall?Pectoralis majorPectoralis minorSerratus anteriorCoracobrachialis  <response>: Muscles of anterior compament of arm are the coraccobrachialis, the biceps brchii and the brachialis. so, the choraccobrachialis is not consider to be the muscle of chest wall and its coroccobrachialis origin is from the tip of the coracoid process of scapula and its inseion is at the medial border of humerus. Ref : B D Chaurasias Human Anatomy , seventh edition , volume 1 , pg, no., 90 table 8.1 