The correct option is C Mitosis in the zygote results in the formation of haploid spores
In a haplontic life cycle, the plant body is a gametophyte and is the dominant phase. The reproductive cell undergoes mitosis to form gametes that are haploid; the gametic fusion results in a diploid zygote, which undergoes meiosis to form haploid spores. So, the incorrect statement is option c.