<prompt> Tonsil is derived from:1st pouch2nd pouch3rd pouch4th pouch  <response>: Ans. B. 2nd pouchPharyngeal PouchDerivatives1Tympanic middle ear cavity Auditory eustachian tube2Palatine tonsils Tonsillar fossa3Inferior parathyroid gland Thymus4Superior parathyroid gland uitimobranchial body parafollicular cells of the thyroid gland 