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
Which of the following is the most specific test for rheumatoid ahritis ? 
Select and explain. 
A. Anti- MCV antibody, B. Anti cardiolipin antibody, C. Anti Mi-2 antibody, D. Anti Ro antibody
A: Anti- MCV antibody
Answer: A: Anti- MCV antibody 
Explanation: Answer- A. Anti- MCV antibodyThe newly developed antimutateil citruIlinated vimenti (Anti MCV assay) have been tasted for the diagnosis of P.A.Their main advantage is early appearance making early detection of R.A.Anti MCV antibodies show strong conehtion with the disease activity, disease severity aqd the success of therapy.