Multiple choice Level of IgG increases and decreases respectively in hyperimmunisation and Bence Jones proteinemia severe malnutrition and lymphoid aplasia IgA myeloma and chronic lymphoblastic leukemia agammaglobulinemia and rheumatoid arthritis Reveal answer Fill a bubble to check yourself B Correct answer Explanation IgG level increases and decreases in severe malnutrition and lymphoid aplasia, respectively.