This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharyngeal Arches, Subject name: Anatomy
Sty loid process is derived from - 
Select and explain. 
A. 1st arch, B. 2nd arch, C. 3rd arch, D. 4th arch
B: 2nd arch
Answer: B: 2nd arch 
Explanation: Ans. is 'b' i.e., 2nd arch o Styloid process is derived from 2nd pharyngeal arch.Pharyngeal ArchMuscular ContributionSkeletal ContributionsNerveArteryCorresponding Pouch Structures1st (mandibular arch)Muscles of mastication. Anterior belly of the digastric, Mylohyoid, Tensor tympani. Tensor veli palatiniMaxilla, mandible (only as a model for mandible not actual formation of mandible). Incus and Malleus, Meckel's cartilage. Ant. Ligament of malleus, Spheno-mandibular ligamentTrigeminal nerve (V2 and V3)Maxillary artery, external carotid arteryEustachian tubc.middle ear. mastoid antrum, and inner layer of the tympanic membrane.2nd (hyoid archMuscles of facial expression. Buccinator, Platysma, Stapedius. Stvlohoid, Posterior belly of the digastricStapes. Styloid process hyoid (lesser horn and upper part of body), Reicherts cartilage. Stylohyoid ligamentFacial nerve (VII)Stapedial Arterymiddle ear. palatine tonsils3rdStvlopharyngeusHyoid (greater horn and lower part of body), thymusGlossophar- yngeal nerve (IX)Common carotid/ internal carotidInferior parathyroid. Thymus4thCricothyroid muscle, all intrinsic muscles of soft palate including levator veli palatiniThyroid cartilage, epiglottic cartilage Cuneiform cartilage Cricoid cartilage Comicuiate cartilageVagus nerve (X) Superior laryngeal nerveRight 4th aortic arch subclavian artery Left 4th aortic arch: aortic archSuperior parathyroid, ultimobranchial body (which forms the Para follicular C-Cells of thyroid gland).6thAll intnrinsic muscles of larynx except the cricothyroid muscleArytenoid cartilagesVagus nerve (X) Recurrent laryngeal nerveRight aortic arch: pulmonary artery Left 6th aortic arch: Pulmonary artery and ductus arteriosusRudimentary structure, becomes part of the fourth pouch contributing to thyroid C-cells.