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': 'Abductor of the vocal cord is : \nSelect and explain. \nA. Posterior cricoarytenoid, B. Lateral cricarytenoid, C. Crichothyroid, D. Thyroepiglottis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e., Posterior cricoarytenoid', 'role': 'assistant'}]