When a lymphocyte encounters a copy of an antigen and receives
stimulatory cues, it
subsequently undergoes _______ to give rise to ____ cells and ________ cells.
a) Genetic recombination; effector; memory
b) Meiosis; effector; memory
c) Clonal selection; cytotoxic T; helper T
d) Meiosis; cytotoxic T; helper
e) Clonal selection; effector; memory
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