Rh factor is a:: (A) Antibody, (B) Mucopolysaccharide, (C) Lipoprotein, (D) Glycoprotein
Answer is A. A Rheumatoid factor is an antibody (auto-antibody) of any immunoglobulin class directed against a specific region of the Fc fragment of human IgG. Ref: Harrison's Principles of Internal Medicine, 17th Edition, Page 2155; Davidson's Principles and Practice of Medicine, 20th Edition, Page 1074