Select the type of cells, present in blood, whose main function is to fight against diseases by destroying harmful bacteria and other foreign material.
(a) RBC
(b) WBC
(c) Platelets
(d) none of these
Correct Answer: (b) WBC
Explanation:
White blood cells (WBCs) are also known as leukocytes. It does not contain hemoglobin and thus are colorless or white in color.
WBCs are mostly produced in bone marrow but also produced in lymph nodes, spleen, etc. The nucleus is present in WBCs that are bilobed, round or irregular shaped.
WBCs are the component of the blood and immune system that helps the body to fight against infectious disease and entry of foreign materials inside the body.
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