This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
An 8 year old child has history of adenoidectomy done one year back. He now complaints of effusion in the middle ear. Which of the following is the most probable diagnosis? 
Select and explain. 
A. Grisel syndrome, B. Velopharyngeal insufficiency, C. Recurrence, D. Rhinolalia clausa
C: Recurrence
Answer: C: Recurrence 
Explanation: Ans. is 'c' i.e., Recurrence * Recurrence is due to regrowth of adenoid tissue left behind. It will lead to persistent symptoms of middle ear effusion.