Multiple Choice
Which statement is true?
A) Natural killer cells are a type of white blood cell that kills virus-infected cells.
B) Phagocytes are smaller than lymphocytes.
C) The two major families of white blood cells are phagocytes and leukocytes.
D) Lymphocytes include B cells and macrophages.
E) Red blood cells have an innate immune defense function.
Correct Answer:

Verified
Correct Answer:
Verified
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