This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Which of the following laryngeal muscle arise from the 4th arch? \nSelect and explain. \nA. Cricothyroid, B. Transverse arytenoids, C. Posterior cricoarytenoid, D. Lateral arytenoids', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The neck is formed by the elongation of the region between the stomatodeum and the pericardium. This is achieved, paly, by a "descent" of the developing hea. However, this elongation is due mainly to the appearance of a series of mesodermal thickenings in the wall of the cranial-most pa of the foregut, i.e. future pharynx. These mesodermal thickenings are called the pharyngeal, or branchial, arches. Fouh arch - Larynx -Cricothyroid * Muscles of pharynx * Intrinsic muscles of soft palate except tensor palati. Ref: Inderbir Singh\'s Human Embryology, eleventh edition, pg. no.,127, Table Ref: Inderbir Singh\'s Human Embryology, eleventh edition, pg. no., 130 (Table 9.2).', 'role': 'assistant'}]