This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: SLE, Subject name: Medicine
Which of the following antibodies is highly specific for systemic lupus erythematosus - 
Select and explain. 
A. Anti-Sm, B. Anti-RO-1, C. Anti-UIRNP, D. Anti-Centeromere
A: Anti-Sm
Answer: A: Anti-Sm 
Explanation: Ans. is 'a' i.e., Anti-Sm