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
[{'content': 'Aery forming anastomosis around surgical neck humerus - \nSelect and explain. \nA. lst pa of axillary aery, B. 2nd pa of axillary aery, C. 3rd pa of axillary aery, D. Subclan aery', 'role': 'user'}, {'content': "Answer: C \nExplanation: 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.", 'role': 'assistant'}]