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
Procedure for serous otitis media is - 
Select and explain. 
A. Tympanoplasty, B. Mastoidectomy, C. Myringotomy, D. Medical treatment
C: Myringotomy
Answer: C: Myringotomy 
Explanation: Myringotomy with grommet insertion is the most common procedure used to treat SOM.