Which blood cells are called ‘Soldiers’ of the body?

✅ D. Potassium dichromatic-sulphuric acid

✅ C. Ole Roemer

✅ C. Leg

✅ A. Igneous rock

✅ A. 100 Billion Galaxies

✅ B. Democritus

✅ C. Phytoplankton

✅ A. 70