hello,shreya!!

you know that there are two kinds of aggranulocyte which is basically responsible for providing adaptive immunity and these fights against foreign materials that is antigen,these are T-LYMPHOCYTES AND B-lymphocytes,b-lymphocyte is formed in bone marrow whereas t-lymhocyte is formed in bone marrow but it's maturation takes place in thymus during maturation these cells are taught to recognise self cells through MHC recognition,thus they know howmto differentiate.