This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Embryology, Subject name: Anatomy
Tympanic membrane develops from? 
Select and explain. 
A. Mesoderm, B. Endoderm, C. Ectoderm, D. All three germ layers
D: All three germ layers
Answer: D: All three germ layers 
Explanation: Ans. (d) All three germ layersRef: Longman's medical embryology 12th ed. / 326