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
A mother brought her child with glue ear. Child had otitis media two weeks before. What is the treatment of choice for glue ear? 
Select and explain. 
A. Myringotomy with cold knife, B. Myringotomy with diode laser, C. Myringotomy with ventilation tube inseion, D. Conservative treatment with analgesics & antibiotics
C: Myringotomy with ventilation tube inseion
Answer: C: Myringotomy with ventilation tube inseion 
Explanation: Otitis media with effusion (OME or glue ear) is defined as fluid in the middle ear space without clinical signs of inflammation or acute symptoms of illness. Otitis media with effusion usually follows an episode of acute otitis media. The guideline recommendation for the management of OME is that ventilating tubes should be placed after an effusion has persisted for 4 months and is accompanied by a bilateral hearing impairment of 20 dB or greater.