Which is the proper order of events in cell-mediated immunity?(1) Cloning of cytotoxic T cells and memory T cells(2) Antigen presented to T lymphocyte(3) Activation of T lymphocytes(4) Cytotoxic T cells attack target cells
A. 1, 4, 2, 3
B. 2, 3, 4, 1
C. 3, 2, 4, 1
D. 2, 3, 1, 4
E. 1, 2, 3, 4,
Answer: D
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