This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Aery forming anastomosis around surgical neck humerus - 
Select and explain. 
A. lst 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: Ans. is'c'i.e., 3rd pa of axillary aeryAnastomosis around surgical neck of humerus is formed by -Anterior circumflex humeral aery.Posterior circumflex humeral aeryBoth are branches of 3rd pa of axillary aery.