Which of the following comparisons of red blood cells and phagocytes is incorrect?

a) Red blood cells: A biconcave disc shape; Phagocytes: Irregular in shape
b) Red blood cells: Fewer in number in the blood; Phagocytes: Greater in number in the blood
c) Red blood cells: Do not have a nucleus; Phagocytes: Have a nucleus
d) Red in color; Colorless