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': 'Which muscle is an abductor of the vocal cords: \nSelect and explain. \nA. Oblique Arytenoid, B. Transverse Arytenoid, C. Lateral Thyroarytenoid, D. Posterior Cricoarytenoid', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Muscle which abduct the vocal cord is posterior cricoarytenoid only', 'role': 'assistant'}]