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
[{'content': 'Largest branch of brachial plexus is \nSelect and explain. \nA. Ulnar, B. Medial, C. Radial, D. Axillary', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Radial Radial nerve is the largest branch of brachial plexus and is the continuation of posterior cord (root value C5_8 T1).", 'role': 'assistant'}]