This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper Extremity, Subject name: Anatomy
[{'content': 'Dorsal scapular nerve supplies: \nSelect and explain. \nA. Teres minor, B. Trapezius, C. Serratus anterior, D. Levator scapulae', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D. Levator scapulaeThe dorsal scapular nerve arises from the brachial plexus, usually from the plexus root (anterior/ventral ramus) of the cervical nerve C5. Once the nerve leaves C5 it commonly pierces the middle scalene muscle, and continues deep to levator scapulae and the rhomboids.It provides motor innervation to the rhomboid muscles and levator scapulae muscle.', 'role': 'assistant'}]