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 inseion: \nSelect and explain. \nA. Anterior superior quadrant, B. Anterior inferior quadrant, C. Posterior superior quadrant, D. Posterior inferior quadrant', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Placement antero-inferiorly compared with placement postero-inferiorly lengthens the time a ventilation tube is in situ. To maximise the duration of potential tube function, the preferred inseion site is anteroinferior through a circmferential or radial incision.', 'role': 'assistant'}]