This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
[{'content': 'NOT a Spiral muscle among the following is \nSelect and explain. \nA. Sternocleidomastoid, B. Supinator, C. Pectoralis major, D. Trapezius', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Spiral muscle are\n\nSupinator\nPectoralis major\nTrapezius\nLatissimus dorsi', 'role': 'assistant'}]