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
The anterior relation of the middle ear cavity is: 
Select and explain. 
A. Chorda tympani, B. Tegmen tympani, C. Tensor tympani, D. Facial nerve
C: Tensor tympani
Answer: C: Tensor tympani 
Explanation: None