<prompt> True statement about tongue epithelium are all except?At beginning -Endodermal whole tongueAny External opening lined by Surface Ectoderm - Ant.23 of tongueAt Sulcus Terminalis- Ectoderm and Endodermal junctionPosterior 13rd - Mesodermal  <response>: Posterior 13 tongue is endodermal in origin . Tongue connective tissue and muscles- mesodermal in origin , connective tissue is derived from pharyngeal arches 1,2 and 3. 