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: Surgery
Obstructive sleep apnoea caused by the following 
Select and explain. 
A. Mandibular ameloblasma, B. Dentigerous cyst, C. Orbital fracture, D. Bilateral TMJ ankylosis
D: Bilateral TMJ ankylosis
Answer: D: Bilateral TMJ ankylosis 
Explanation: None