What is the correct sequence of events in a primary immune response?
1 )
T-lymphocyte activation $ \to $B-lymphocyte selection $ \to $plasma cell release
antigen presentation by macrophages $ \to $cytokines released by T-helper cells $ \to $B-lymphocyte differentiation
3 )
antigen presentation by neutrophils $ \to $T-memory cell activation $ \to $B-lymphocyte selection
4 )
T-memory cell activation $ \to $B-memory cell activation $ \to $antibody production
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