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All the cells that participate in immune responses originate from a population of
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- neutrophils
- stem cells
- macrophages
- lymphocytes
Correct Option: D
A lymphocyte is a type of white blood cell in the vertebrate immune system.Under the microscope, lymphocytes can be divided into large lymphocytes and small lymphocytes. Large granular lymphocytes include natural killer cells (NK cells). Small lymphocytes consist of T cells and B cells.
