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
Seronegative ahritis include- 
Select and explain. 
A. Ankylosing spondylitis, B. Reiters ahritis, C. Psoriatic ahritis, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. is `d' i.e., All of the above