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': 'Which of the following conditions causes maximum hearing loss \nSelect and explain. \nA. Ossicular disruption with intact tympanic membrane, B. Disruption of malleus and incus with intact tympanic membrane, C. Ottitis media with effusion, D. Paial fixation ofthe stapes footplate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: CONDUCTIVE HEARING LOSS AVERAGE HEARING LOSS SEEN IN DIFFERENT LESIONS OF CONDUCTIVE APPARATUS 1. Complete obstruction of ear canal: 30 dB 2. Perforation of tympanic membrane (It varies and is directly propoional to the size of perforation): 10-40 dB 3. Ossicular interruption with intact drum: 54 dB 4. Ossicular interruption with perforation: 38 dB 5. Malleus fixation: 10-25 dB 6. Closure of oval window: 60 dB Note here that ossicular interruption with intact drum causes more loss than ossicular interruption with perforated drum. Ref:- Dhingra; pg num:-29', 'role': 'assistant'}]