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
[{'content': 'Which of the following causes the opening of the eustachian tube \nSelect and explain. \nA. Salpingopharyngeus, B. Levator veli palatini, C. Tensor veli palatini, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The medial fibres of tensor veli palatini 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.', 'role': 'assistant'}]