Do pollen grains have the same number of chromosomes as a regular plant cell?

The pollen grain is actually the male gametophyte generation of seed plants. Inside the anther, pollen mother cells divide by meiosis to form pollen grains whose nuclei contain half the number of chromosomes characteristic of the parent plant. 

(hope that helped answer the question)

the answer to your question is b

the denominator has a very specific role.