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 child presenting with recurrent respiratory tract infection, mouth breathing & decreased hearing treatment is -a) Tonsillectomyb) Adenoidectomyc) Grommet insertiond) Myringotomye) Myringoplasty 
Select and explain. 
A. abc, B. acd, C. ac, D. bcd
D: bcd
Answer: D: bcd 
Explanation: None