Microbiology Immunology f2b6dfee TRUE about immunoglobulins is - A IgE fixes complement B IgM fixes complement C IgG is found in minimum concentration D IgG is elevated in primary immune response High-Yield Explanation IgM is paicularly effective at complement activation by binding to C1 Ref: Ananthanarayan & Parker's textbook of microbiology 9th edition pf:98