Read the following statements and choose the correct option 1.The primary immune response is of high intensity when the body first encounters a pathogen. 2.T-lymphocytes are primarily involved in cell-mediated immunity (CMI). 3.Antibodies are produced by T-lymphocytes to fight against pathogens. 4.IgA, IgM, IgE, and IgG are types of antibodies produced by B-lymphocytes. 5.The secondary immune response is also known a

Step-by-step solution

The B-lymphocytes produce an army of proteins in response to pathogens into our blood to fight with them. These proteins are called antibodies. The T-cells themselves do not secrete antibodies but help B cells to produce them. Each antibody molecule has four peptide chains, two small called light chains and two longer called heavy chains. Hence, an antibody is represented as H2 L2 . Different types of antibodies are produced in our body. IgA, IgM, IgE, IgG are some of them. A cartoon of an antibody is given in Figu