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': 'A young man presents with an accident leading to loss of hearing in right ear. On otoscopic examination the tympanic membrane was intact. Pure tone audiometry shows an Air-Bone gap of 55 dB in the right with normal cochlear reserve. Which of the following will be the likely tympanometry finding - \nSelect and explain. \nA. AS type tympanogram, B. AD type tympanogram, C. B type tympanogram, D. C type tympanogram', 'role': 'user'}, {'content': 'Answer: B \nExplanation: This is also a very interesting question:\n\nThe question says. Pure tone audiometry shows an air bone gap of 55 dB in the right ear with normal cochlear reserve.\nThe air-bone gap in pure tone audiometry is a measure of total conductive deafness.\nHence – it means there is a conductive deafness of 55 dB in the right ear.\nNext the question says – Patient has intact tympanic membrane so we have to look for a cause of this 55 dB conductive deafness.\n\nAverage hearing loss seen in different lesions of conductive apparatus', 'role': 'assistant'}]