This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Tympanic membrane is derived from which layer? \nSelect and explain. \nA. Ectoderm, B. Endoderm, C. Mesoderm, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: HUMAN EMBRYOLOGY-INDERBIR SINGH TENTH EDITION-PAGE NO:372 Tympanic membrane This is formed by the apposition of the tubotympanic recess and the first ectodermal cleft ,these two forming the inner(endodermal)and outer(ectodermal) epithelial linings of the membrane.the intervening mesoderm forms the connective tissue basis', 'role': 'assistant'}]