This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
Which of the following causes opening of eustachian tube 
Select and explain. 
A. Salpingopharyngeus, B. Levator veli palatine, C. Tensor veli palatine, D. None of the above
C: Tensor veli palatine
Answer: C: Tensor veli palatine 
Explanation: The medial fibres of tensor veli palatine are attached to the lateral lamina of the tube and when they contract they help to open the tube lumen. These fibres also called dilator tube muscles. Reference: Dhingra 6th edition.