<prompt> Most specific antibody seen in RAAnti CCPRheumatoid factorANAAnti dsDNA  <response>: Answer- A. Anti CCPThe presence of serum anti-CCP antibodies has about the same sensitivity as serum RF for the diagnosis of RA.However, its diagnostic specificity approaches 95 most specific for RA, so a positive test for anti-CCP antibodies in the setting of an early inflammatory ahritis is usefrrlfor distinguishing RA from other forms of ahritis. 