<prompt> Which of the following causes opening of eustachian tubeSalpingopharyngeusLevator veli palatineTensor veli palatineNone of the above  <response>: 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. 