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
All of the following structures passes through the deltopectoral triangle, EXCEPT ? 
Select and explain. 
A. Cephalic vein, B. Axillary nerve, C. Deltopectoral lymph nodes, D. Branch of thoracoacromial aery
B: Axillary nerve
Answer: B: Axillary nerve 
Explanation: Contents of the deltopectoral triangle are cephalic vein, deltoid branch of thoracoacromial aery and deltopectoral nerves. Boundaries of the triangle are formed by:Upper margin of pectoralis major mediallyAnterior margin of deltoid laterallyClavicle superiorly