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': 'Lady has bilateral hearing loss since 4 years which worsened during pregnancy. Type of impedance audiometry graph will be \nSelect and explain. \nA. Ad, B. As, C. B, D. C', 'role': 'user'}, {'content': 'Answer: B \nExplanation: As type is seen where compliance is lower at or near ambient air pressure. This occurs in fixation of ossicles(otosclerosis). Ref: Diseases of EAR, NOSE and THROAT by PL Dhingra 6th Edition page no.24', 'role': 'assistant'}]