All of the following are true about the larynx EXCEPT:
All intrinsic muscles of larynx are supplied by the recurrent laryngeal nerve except cricothyroid which is supplied by the external laryngeal nerve.
All intrinsic muscles are supplied by the recurrent laryngeal nerve
Cricothyroid is supplied by the external laryngeal nerve
Posterior cricoarytenoid abduct the vocal cords
Lymphatic  drainage  of  the  larynx  is  to  the  deep  cervical nodes