<prompt> TRUE about immunoglobulins is :IgE fixes complementsIgM fixes complements.IgG is found in minimum concentration.IgG is elevated in primary immune response.  <response>: Ans. is b i.e. IgM Fixes complement. Important facts about Immuno globinsImmunoglobulin to fix complements via classical pathway - IgG IgM IgM- IgGImmunoglobulin to fix complements via Alternate pathway - IgA IgDImmunoglobulin with ,maximum serum cone -IgGImmunoglobulin with minimum serum cone -IgEHeat Labile Immunoglobulin -IgEImmunoglobulin in primary immune response -IgMImmunoglobulin in 2ndary immune response -IgGImmunoglobulin with maximum molecular weight -IgMImmunoglobulin present in milk - IgA IgGImmunoglobulin with maximum sedimentation coefficient -IgMImmunoglobulin with shortest 12 life -IgEImmunoglobulin in sero mucinous Glands -IgG IgAIg resp. for hypersensitive pneumonitis -Ig GIg mediating the Prausnitz Kustner reaction -Ig EHomo cytotropism is seen in which Ig -Ig E 