False about larynx ?: (A) 9 cailages - 3 paired and 3 unpaired., (B) Extends from C3 to C6 veebrae., (C) External laryngeal nerve supplies all laryngeal muscles except cricothyroid., (D) Cricothyroid is a tensor of vocal cord.
Answer is C. Larynx is made up of 9 cailages : 3 paired & 3 unpaired. It extends from C3 - C6 veebral level. All laryngeal muscles are supplied by recurrent laryngeal nerve except cricothyroid (supplied by external laryngeal nerve). Cricothyroid tenses the vocal cord .