This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Back, Deltoid, and Scapular Region, Subject name: Anatomy
[{'content': 'Which nerve is involved? \nSelect and explain. \nA. Long thoracic Nerve, B. Musculocutaneous nerve, C. Lateral anterior thoracic nerve, D. Thoracodorsal nerve', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Long Thoracic NerveNerve involvedMuscleLong thoracic NerveSerratus anteriorMusculocutaneous NerveCoracobrachialis muscleLateral anterior thoracic NervePectoralis major muscleThoracodorsal NerveLatissmus Dorsi', 'role': 'assistant'}]