The right answer is 16 chromosomes.
Like all gametes, the egg is haploid, it contains half of the chromosomes of the future embryo (half of 32 is 16). Note that in the human species, this is not true haploidy because the egg has not completed its meiosis (it is blocked in metaphase II), so we speak rather of oocyte II, so it contains 2C DNA and N chromosomes with 2 chromatids.
