The following statements describe some of the stages in phagocytosis.
1 Bacteria become surrounded in a phagocytic vacuole.
2 Bacteria release chemicals that attract neutrophils.
3 Lysosomes fuse with the phagocytic vacuole.
4 Receptor proteins on the neutrophil bind to the bacteria.
Which order defines the correct sequence for phagocytosis?

1 )
A
B
3 )
C
4 )
D
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