This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
[{'content': 'Abductor muscle of vocal cord is \nSelect and explain. \nA. Cricothyroid, B. Interarytenoid, C. Lateral cricoarytenoid, D. Posterior cricoarytenoid', 'role': 'user'}, {'content': 'Answer: D \nExplanation: movement and muscle: 1. elevation of larynx: thyrohyoid, mylohyoid 2. Depression of larynx: sternothyroid, sternohyoid 3. Opening inlet of larynx: thyroepiglottic 4.abductor of vocal cords: posterior cricoarytenoid only 5. Adductor of vocal cords: lateral cricoarytenoid and transverse and oblique arytenoids Ref BDC volume 3; 6th edition pg 258', 'role': 'assistant'}]