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 ahritis, C. Scleroderma, D. Polymyositis
A: SLE
Answer: A: SLE 
Explanation: Answer is A (SLE): Anti Ds DNA antibodies are specific for SLE