AP EAMCET Medical 2018 Shift 1 Paper

Read the following statements
I) Tc lymphocytes are involved only in cell mediated immunity
II) Thymus gland of mammals is a secondary lymphoid organ
III) The pail of antibody that recognises and binds to an antigen is called epitope
IV) Interleukins are primarily involved in differentiation of the cells of immune system
Among the above, the incorrect statements are