All of the following forms the boundaries of the lower triangular space of arm, EXCEPT?: (A) Teres major, (B) Shaft of humerus, (C) Pectoralis major, (D) Long head of triceps
Answer is C. Boundaries of lower triangular space of arm are: medially it is bounded by long head of triceps, laterally by medial border of humerus and superiorly by teres major. Radial nerve and profunda brachii vessels are the contents of the lower triangular space.