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': 'Nerve supply of larynx above level of vocal cord \nSelect and explain. \nA. Superior laryngeal, B. Recurrent laryngeal, C. Glossopharyngeal, D. External laryngeal', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Up to the vocal folds; By the superior laryngeal aery, a branch of the superior thyroid aery. Below the vocal folds; By the inferior laryngeal aery, a branch of the inferior thyroid aery. Ref BDC volume 3;6th edition', 'role': 'assistant'}]