Answer: Monocytes.
Explanation:
Monocytes have a abundant amount of gray cytoplasm with fine lilac granules in it and because of this the cytoplasm appears ground glass.
The vacuoles are vacant and there is a gap sen in the cell as vacuoles when observed under microscope. The vacuoles of the monocytes are not stained.
They have a U-shaped nucleus and are extremely motile. The monocytes are lightly stained as compared to leukocytes.
