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
Grommet tube is used in - 
Select and explain. 
A. Secretory otitis media, B. Mucoid otitis media, C. Serous otitis media, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: In some cases of myringotomy, a ventilation tube, also known as grommet or tympanostomy tube, is inserted through myringotomy incision to allow future drainage of the fluid.
The most common indication for myringotomy and grommet insertion is serous otitis media also known as secretory otitis media or mucoid otitis media.
However, it should be kept in mind that SOM is not the only indication for myringotomy with grommet insertion. Other indications are :-


Recurrent acute otitis media (three or more significant ear infections within a six month period).
Chronic otitis media with effusion
Complications of acute otitis media
Tympanic membrane abnormalities (atelectasis or retraction)
Conditions predisposing to eustachian tube dysfunction