Anatomy Upper limb f330806e The largest branch of brachial plexus is ? A Ulnar B Medial C Radial D Axillary High-Yield Explanation The radial nerve is the largest branch of the posterior cord of the brachial plexus with a root value of C5-C8, T1. Ref: BD Chaurasia; Volume I; 7th edition; Page no: 57.