The events listed occur during the primary immune response to a specific pathogen.
1- activation of B-lymphocyte to produce plasma cells and memory cells
2- phagocytosis of invading pathogens by macrophages
3- T-helper cell activation and production of T-killer cells
4- expression of antigens on phagocyte cell surface
5- production and release of antibodies
Which row identifies a correct sequence of events?
1 )
A
B
3 )
C
4 )
D
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