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 statement regarding Eustachian tube dysfunction is wrong? \nSelect and explain. \nA. Undistoed light image on the anterior quadrant of tympanic membrane, B. No movement of the tympanic membrane on siegel's method, C. Malleus is easily visible, D. Lusterless tympanic membrane", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Normally Eustachian tube (ET) is closed and opens intermittently during yawning, swallowing and sneezing through active contraction of Tensor vili palatini muscle.', 'role': 'assistant'}]