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
The root value of axillary nerve is 
Select and explain. 
A. C5, C6, B. C7, C8, C. C8, T1, D. C5, T1
A: C5, C6
Answer: A: C5, C6 
Explanation: axillary nerve also known as circumflex nerve - The axillary nerve is a branch of the posterior cord of the brachial plexus and the root value is C5 , C6. Axillary or circumflex nerve is an impoant nerve because it supplies the deltoid muscle which is the main abductor of the arm. Ref : B D Chaurasia's Human Anatomy , Seventh edition, volume 1 , pg. no, 75.