This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy of Middle Ear, Subject name: ENT
Stapes foot plate covers: 
Select and explain. 
A. Round window, B. Oval window, C. Sinus tympani, D. Pyramid
B: Oval window
Answer: B: Oval window 
Explanation: The Oval window is covered by the footplate of stapes. The Round window is covered by secondary tympanic membrane.