This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fracture of the Humerus, Subject name: Orthopaedics
[{'content': 'Fracture shaft of humerus damages which nerve? \nSelect and explain. \nA. Radial nerve, B. Median nerve, C. Axillary nerve, D. Ulnar nerve', 'role': 'user'}, {'content': "Answer: A \nExplanation: ANSWER: (A) Radial nerveREF: Snell's anatomy 7th ed p. 484Radial nerve injury is seen in:Fracture shaft of humerusSaturday night palsyInjection palsyFeatures of radial nerve injury:Sensory loss over area supplied by posterior cutaneous nerve of forearm.Wrist, thumb and finger extension is lost.", 'role': 'assistant'}]