<prompt> Which of the following diseases of the skin is the mostlikely to be associated with partial anodontia?erythema multiformaehereditary ectodermal dysplasiakeratosis follicularitslichen Onus  <response>: Ectodermal dysplasia is characterized by congenital dysplasia of ectodermaL structures, manifested as hypohidrosis partial or complete absence of sweat glands hypotrichosis and hypodontia or partial anodontia.Two typesHypohidrotic Christ-Siemens-Touraine syndrome most common type and includes dental manifestations.Hidrotic Clouston syndrome- no specific dental defects are seen. 