Which of the following is not true about the larynx?
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
All intrinsic muscles are supplied by the recurrent laryngeal nerve except cricothyroid is supplied by external laryngeal nerve.