This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper limb, Subject name: Anatomy
[{'content': 'Which muscle will be paralyzed when the radial nerve is injured in just below the spiral groove? \nSelect and explain. \nA. Lateral head of triceps, B. Medial head of triceps, C. Long head bf triceps, D. Extensor carpi radialis longus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: -The radial nerve supplies Extensor carpi radialis longus below the spiral groove while the branches to long, medial and lateral heads of triceps are given off in the arm before the nerve descends into the spiral groove. Reference: Clinical Anatomy for students, a problem-solving approach, Neeta v Kulkarni, 2nd edition, page no.179', 'role': 'assistant'}]