This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharynx, Subject name: ENT
A 6-year-old boy presented to ENT OPD with recurrent UI, mouth breathing and impaired hearing. The boy was diagnosed as having adenoid hyperophy for which adenoidectomy was done and grommet inseed; 1 week after surgery the boy was again brought to the OPD with toicollis. Which of the following are true 
Select and explain. 
A. Adenoidectomy should not have been done in the patient as adenoids would have spontaneously regressed, B. Toicollis is not a complication after adenoid surgery and it is a sheer coincidence, C. The condition is most common in children with Down's syndrome, D. Atlantoaxial subluxation is the cause for his toicollis
D: Atlantoaxial subluxation is the cause for his toicollis
Answer: D: Atlantoaxial subluxation is the cause for his toicollis 
Explanation: ADENOIDECTOMY COMPLICATIONS:- Grisel syndrome:- Patient complains of neck pain and develops toicollis. Mostly it is due to spasm of paraspinal muscles, but can be due to atlantoaxial dislocation requiring cervical collar and even traction. Ref:- Dhingra; pg num:- 432