This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Peripheral nerve injuries, Subject name: Anatomy
[{'content': 'Autonomous zone of sensory supply by radial nerve \nSelect and explain. \nA. 1st dorsal web space, B. Tip of index finger, C. Tip of thumb, D. Tip of little finger', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Autonomous zone for radial nerve is 1st dorsal web space Refer Campbell 12th/e p 3100', 'role': 'assistant'}]