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: ENT
Stapes foot plate covers which of the following structure? 
Select and explain. 
A. Round window, B. Oval window, C. Inferior sinus tympanum, D. Pyramid
B: Oval window
Answer: B: Oval window 
Explanation: The stapes is the smallest bone in the human body and is located in the oval window. Foot plate of the stapes rest on oval window, which is an opening of the vestibule and the scala vestibuli of the cochlea. The oval window is located at the bottom of a deep depression outlined by the facial nerve superiorly, the promontory inferiorly, the cochleariform process anteriorly and the pyramidal eminence posteriorly.