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
[{'content': 'A 25-year-old woman suffering from bilateral hearing loss for 6 years which became profound with pregnancy. On tympanogram, which of the following curve is obtained? \nSelect and explain. \nA. AD, B. AS, C. B, D. A', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Bilateral hearing loss getting worse in pregnancy is due to otosclerosis. Tympanogram in this case would be AS type. It is a normal tympanogram with reduced compliance due to stapes fixation.', 'role': 'assistant'}]