<prompt> Which of the immunoglobulin has Maximum half-life-Ig GIg AIg MIg E  <response>: Serum Half-life: IgG G1, G2, and G4: 23 days maximum and Subclass 3 has half-life of 8 days. IgA: 06 days IgM: 05 days IgD: 03 days IgE:2.5 days minimum 