This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharyngeal Arches, Subject name: Anatomy
True statement about tongue epithelium are all except? 
Select and explain. 
A. At beginning -Endodermal (whole tongue), B. Any External opening lined by Surface Ectoderm - Ant.2/3 of tongue, C. At Sulcus Terminalis- Ectoderm and Endodermal junction, D. Posterior 1/3rd - Mesodermal
D: Posterior 1/3rd - Mesodermal
Answer: D: Posterior 1/3rd - Mesodermal 
Explanation: Posterior 1/3 tongue is endodermal in origin . Tongue connective tissue and muscles- mesodermal in origin , connective tissue is derived from pharyngeal arches 1,2 and 3.