Anatomy All are true about brachial plexus EXCEPT:- A Lower trunk is formed by root C8 and T1 B Lateral cord is formed by upper and middle trunk C Posterior cord is formed by posterior divisions of all three trunks D C4 root is post fixed to plexus 💡 Explanation All are true about brachial plexus EXCEPT:- ✓ Correct Answer: D. C4 root is post fixed to plexus