Pentavalent immunoglobin is-: (A) IgA, (B) IgG, (C) IgM, (D) IgE
Answer is C. IgM IgM is Pentavalent Ig It has max molecular weight It has max sedimentation coefficient IgM is produced first in immune response IgM plays a role in :- 1. Opsonisation 2. Classical complement pathway 3. IgM & IgD are present over B cell surface