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Question

An example of innate immunity is-

A
B–lymphocytes
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B
PMNL–neutrophils
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C
TH cells
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D
T–lymphocytes
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Solution

The correct option is B PMNL–neutrophils
Innate immunity refers to non-specific defence mechanisms that come into play immediately or within hours of an antigen's appearance in the body. These mechanisms include physical barriers such as skin, chemicals in the blood, and immune system cells such as neutrophils that attack foreign cells in the body. Polymorphonuclear leukocytes (PMNL - neutrophils) are the granulocytes characterized by the presence of granules in their cytoplasm. They provide innate immunity.

So, the corret answer is- PMNL - neutrophils

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