Which of the following is a type of lymphocyte that is our primary defense against cancer and provides help in fighting viral and parasitic infections?

Question

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Natural killer (NK) cells are a type of lymphocyte that provides our primary defense against cancer and also helps fight against viral and parasitic infections. T-lymphocytes and B-lymphocytes are also important in the immune response, but they have different functions and are not the primary defense against cancer. Polymorphonuclear leukocytes are a type of white blood cell that helps fight bacterial infections.

Which of the Following Is a Type of Lymphocyte That