Which action is taken by a B-lymphocyte activated by an antigen?
1 )
It attaches to the infected cell displaying the antigen and destroys it.
It divides repeatedly to form a clone of genetically identical plasma cells.
3 )
It engulfs the infected body cell which displays the antigen.
4 )
It secretes cytokines which stimulate T-lymphocytes to produce plasma cells.
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