Help with Meiosis Practice Test

During which of the following stages of meiosis is the ploidy of the cell equal to n (haploid)?

I. Telophase I, after nuclear envelopes reform

II. Metaphase II, while chromosomes are lined up on the equatorial plate

III. Anaphase II, immediately after separation of sister chromatids

IV. Metaphase I, while chromosomes are lined up on the equatorial plate