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: Pathology
The most common complication following rheumatoid arthritis of the TMJ is: 
Select and explain. 
A. Ankylosis, B. Synovial chondromatosis, C. Subluxation, D. Osteoarthritis
A: Ankylosis
Answer: A: Ankylosis 
Explanation: None