Multiple choice

In human body which cells fight against infection?

  1. Red blood cells

  2. Plasma

  3. White blood cells

  4. Hemoglobin

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The correct answer is white blood cells (leukocytes), which are the cells in the human body that fight infection. They are part of the immune system. Red blood cells carry oxygen, plasma is the fluid component, and hemoglobin is the oxygen-carrying protein in red blood cells.