<prompt> CD 3 receptor is seen in ?T cellsB cellsMacrophagesEosinophils  <response>: Ans. is a i.e., T cells CD marker Lymphocytes and other leukocytes have a number of surface antigens or marker - leukocyte differentiation antigen. A paicular leucocyte differentiation antigen has been given a CD cluster of differentiation number on the bases of its reaction with a cluster of monoclonal antibodies. These markers reflect the stage of differentiation and functional propeies of cell. 