<prompt> Ceruminous glands are modifiedEccrine glandsApocrine glandsSebaceous glandsHolocrine glands  <response>: Cailaginous pa of an external auditory meatusThe skin covering it is thick and has ceruminous glands modified apocrine sweat glands, pilosebaceous glands and hair. Since hair is confined to cailaginous pa, furuncle is seen only is the outer third of the canal.Ref: PL Dhingra, Diseases of Ear, Nose Throat, 7th edition, pg no. 3 