Multiple choice

______ fights disease.

  1. RBC

  2. WBC

  3. Platelets

  4. Plasma
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

WBC (White Blood Cells) is correct because white blood cells are the primary component of the immune system that fights infections and diseases. RBCs carry oxygen, platelets help with blood clotting, and plasma is the liquid medium that carries the cells.

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