Cells present in the mature pollen grains are ______________.

Correct option is C

When the pollen grain matures it has two cells - the vegetative cell and generative cell.
The vegetative cell is bigger, has abundant food reserve and a large irregularly shaped nucleus.
The generative cell is small and floats in the cytoplasm of the vegetative cell. Central cell, antipodal cell and filiform apparatus are part of a mature embryo sac.