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': 'Which of the following nerve involved in-opening inlet of larynx? \nSelect and explain. \nA. Recurrent laryngeal nerve, B. External laryngeal nerve, C. Internal laryngeal nerve, D. Superficial laryngeal nerve', 'role': 'user'}, {'content': 'Answer: A \nExplanation: All intrinsic muscles of the larynx are supplied by the recurrent laryngeal nerve except for the cricothyroid which is supplied by the external laryngeal nerve. The cavity of larynx extends from the inlet of the larynx to the lower border of the cricoid cailage.the inlet of the larynx is placed obliquely.it looks backwards and upwards and opens into the laryngopharynx. Ref BDC volume 3;Sixth edition pg 257', 'role': 'assistant'}]