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': 'Ideal site for myringotomy and grommet insertion- \nSelect and explain. \nA. Anterior superior quadrant, B. Anterior inferior quadrant, C. Posterior superior, D. Posterior inferior', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Incision sites for myringotomy\n\nTwo common incision sites are used :-\n\ni)\xa0\xa0\xa0\xa0\xa0\xa0 Anterior-inferior quadrant\n\nAlso known as anterior myringotomy\nUsed in cases of serous otitis media when grommet is to be inserted\n\nii)\xa0\xa0\xa0\xa0\xa0 Postero-inferior quadrant\n\nAlso known as posterior myringotomy\nUsed in cases of ASOM\nThis area is preferred because this is the most accessible area, relative less vascular and there are less chances of damage to ossicular chain.\nNow the question arises, If the posterior - inferior quadrant is more accessible and less vascular, why the grommet tube is inserted through anterior-inferior incision?\nThe answer is:-\n\n"Grommet inserted through posterior myringotomy incision may cause incus necrosis from the pressure on long\xa0process and may damage incudostapedial joint or round window. Therefore, anterior or inferior insertion is\xa0safer".\n— Pediatric otolaryngology', 'role': 'assistant'}]