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
Artery not involved in Vascular anastemosis around Acromian 
Select and explain. 
A. Thyrocervical Trunk, B. Thoracoacromial trunk, C. Anterior circumflex humeral artery, D. Posterior circumflex humeral artery
C: Anterior circumflex humeral artery
Answer: C: Anterior circumflex humeral artery 
Explanation: Acromial Branch of Thyrocervical Trunk (Branch of 1st part of Subclavian artery).
Acromial Branch of Thoracoacromial trunk (Branch of 2nd part of Axillary artery).
Acromial branch of  posterior circumflex humeral artery form anastomosis around Acromian.