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: Pathology
Which of the following is most specific antibody detected in patients with Rheumatoid arthritis? 
Select and explain. 
A. IgG, B. IgM, C. Anti CCP, D. Anti mitochondrial
C: Anti CCP
Answer: C: Anti CCP 
Explanation: Anti CCP (anti-cyclic citrullinated peptide) is the most specific antibody for Rheumatoid arthritis.