This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuroanatomy, Subject name: Anatomy
Which muscle of larynx is supplied by external laryngeal nerve? 
Select and explain. 
A. Cricothyroid, B. Lateral Cricoarytenoid, C. Thyroarytenoid, D. Posterior cricoarytenoid
A: Cricothyroid
Answer: A: Cricothyroid 
Explanation: Ans. A CricothyroidRef: BDC, Vol: 3 pg. 242, 244* All intrinsic muslces of the larynx are supplied by the recurrent laryngeal nerve except cricothyroid which is supplied by external laryngeal nerve.* Recurrent laryngeal nerve supplies posterior cricoarytenoid, lateral cricoarytenoid, transverse and oblique arytenoids, aryepiglotticus, thyroarytenoid, thyroepiglotti- cus muscle.Extra MileMUST KNOW about laryngeal muscles movementsMovementMusclesAbduction of vocal cordsPosterior cricoarytenoids onlyAdduction of the vocal cordsLateral cricoarytenoids and transverse arytenoids, thyroarytenoidTensor of vocal cordsCricothyroidRelaxor of vocal cordThyroarytenoidElevation of larynxThyrohyoid, mylohyoidDepression of larynxSternothyroid, sternohyoid