External branch of superior laryngeal nerve supply:: (A) Cricothyroid, (B) Thyroarytenoid, (C) Posterior cricoarytenoid, (D) Cricoarytenoid
Answer is A. Right recurrent laryngeal nerve may be superﬁcial or deep to the inferior thyroid artery.
Occasionally, some branches are superﬁcial & some are deep.
Left recurrent laryngeal nerve is usually deep to inferior thyroid artery.