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': 'Myringotomy is: \nSelect and explain. \nA. Surgical opening in Eustachian tube, B. Surgical opening in tympanic membrane, C. Surgical opening in semicircular canal, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Myringotomy is a surgical procedure of the eardrum or tympanic membrane.The procedure is performed by making a small incision with a myringotomy knife through the layers of tympanic membrane.This surgical procedure permits direct access to the middle ear space and allows the release of middle-ear fluid, which is the end product of otitis media with effusion (OME), whether acute or chronic.', 'role': 'assistant'}]