This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
Palatine Tonsils develop from - 
Select and explain. 
A. 1st pharyngeal arch, B. Second pharyngeal arch, C. Second pharyngeal pouch, D. Third pharyngeal pouch
C: Second pharyngeal pouch
Answer: C: Second pharyngeal pouch 
Explanation: Ans. is 'b' i.e., Second pharyngeal arch * Palatine tonsil develops from the 2nd pharyngeal pouch.PharyngealArchMuscular 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, Sphenomandibular ligamentTrigeminal nerve (V2 and V3)Maxillary artery, external carotid arteryEustachian tube, middle ear, mastoid antrum, and inner layer of the tympanic membrane.2nd (hyoid archMuscles of facial expression, Buccinator, Platysma, Stapedius, Stylohyoid, Posterior belly of the digastricStapes, Styloid process hyoid (lesser horn and upper part of the body), Reichert's cartilage, Stylohyoid ligamentFacial nerve (VII)Stapedial Arterymiddle ear, palatine tonsils3rdStylopharyngeusHyoid (greater horn and lower part of the body), thymusGlossopharyngeal nerve (IX)Common carotid/ internal carotidInferior parathyroid, Thymus4thCricothyroid muscle, all intrinsic muscles of soft palate including levator vile palatiniThyroid cartilage, epiglottic cartilage Cuneiform cartilage Cricoid cartilage Corniculate cartilageVagus nerve (X) Superior laryngeal nerveRight 4th aortic arch subclavian artery Left 4th aortic arch: aortic archSuperior parathyroid, ultimobranchial body (which forms the Parafollicular C-Cells of\ thyroid gland).6thAll intrinsic muscles of the 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.