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
Aery forming anastomosis around surgical neck humerus 
Select and explain. 
A. 1st pa of axillary aery, B. 2nd pa of axillary aery, C. 3rd pa of axillary aery, D. Subclan aery
C: 3rd pa of axillary aery
Answer: C: 3rd pa of axillary aery 
Explanation: Anterior Circumflex humeral aery and posterior Circumflex humeral aery are branches from 3rd pa of axillary aery . These two anastomose around the surgical neck of humerus . Posterior Circumflex humeral aery runs along with axillary nerve and passes through the quadrangular intermuscular space . B D Chaurasia 7th edition Page no : 53