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: Medicine
Anti-ds DNA is most specific for - 
Select and explain. 
A. SLE, B. Rheumatoid Arthritis, C. Polymyositis, D. Sjogrens syndrome
A: SLE
Answer: A: SLE 
Explanation: None