Given these events that are part of helper T cell activation
1. interleukin1 released by macrophage (costimulation)
2. antigen processed by macrophage
3. helper T cell binds to macrophage
4. helper T cell releases interleukin2 and divides
5. antigen displayed on MHC molecule
Arrange the events in the order that they occur as an antigen is recognized and a helper T cell is activated.
a. 1,4,2,5,3
b. 2,5,3,1,4,
c. 3,1,4,2,5
d. 4,2,5,3,1
e. 5,3,1,4,2
Answer: b
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