This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Which of the following structures develops from all the three germ layers? 
Select and explain. 
A. Soft Palate, B. Mitral valve, C. Tympanic membrane, D. Tooth
C: Tympanic membrane
Answer: C: Tympanic membrane 
Explanation: None