Heat labile immunoglobulin-: (A) IgA, (B) IgG, (C) IgE, (D) IgM
Answer is C. Option 1, 2, 3, 4 All Abs are heat stable (Heat stability 56oC) except IgE (heat labile). IgE exhibits unique propey of heatlability (inactivated at 56degC in one hour)