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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
The largest branch of brachial plexus is ?
assistant
The correct answer is  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.