This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
Which of the following is related to floor of middle ear? 
Select and explain. 
A. Round window, B. Internal carotid aery, C. Internal jugular vein, D. Tegmen tympani
C: Internal jugular vein
Answer: C: Internal jugular vein 
Explanation: The floor or Jugular Wall of the middle ear is formed by a thin plate of bone which separates the middle ear from the superior bulb of the internal jugular vein. This plate is a pa of the temporal bone, Near the medial wall, the floor presents the tympanic canaliculus which transmits the tympanic branch of the glossopharyngeal nerve to the medial wall of the middle ear. Ref: BD Chaurasia's HUMAN ANATOMY, Volume 3, 4th edition.