The immunoglobulin which exhibits 'homocytotropism' is -: (A) IgA, (B) IgE, (C) IgG, (D) IgM
Answer is B. Immunoglobulin E (IgE) A type of protein in blood plasma that acts as an antibody to activate allergic reactions. REF: Ganong's Review of Medical physiology; 24th edition; page no:77