Anatomy Enumerate the two structures passing through quadrangular space of back: A Suprascapular artery and Axillary nerve. B Subscapular artery and Radial nerve. C Posterior circumflex humeral artery and Axillary nerve. D Profunda brachii artery and Radial nerve. 💡 Explanation Enumerate the two structures passing through quadrangular space of back: ✓ Correct Answer: C. Posterior circumflex humeral artery and Axillary nerve.