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': 'Grommet tube is used in: \nSelect and explain. \nA. Secretory otitis media, B. Mucoid otitis media, C. Serous otitis media, D. All of the above', 'role': 'user'}, {'content': "Answer: D \nExplanation: Myringotomy is coupled with grommet tube inseion in: Serous otitis media (also k/a mucoid otitis media/glue ear) Adhesive otitis media Recurrent acute otitis media Meniere's disease", 'role': 'assistant'}]