A

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Q. Which of the following protects the body against infectious disease and foreign invaders?

  • (A) Leukocytes
  • (B) Red blood cells
  • (C) Endoplasmic reticulum (ER)
  • (D) Golgi apparatus
  • Correct Answer - Option(A)
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  • Filed under category Biology
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Explanation by: Admin
White blood cells (WBCs), also called leukocytes or leucocytes, are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders. All white blood cells are produced and derived from multipotent cells in the bone marrow known as hematopoietic stem cells.

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