The correct option is C A- Spores, B- Gametophyte, C- Haplo-diplontic life cycle, D- Zygote
The life cycle shown in the diagram is haplo-diplontic, which is seen in bryophytes and pteridophytes. The sporophyte produces spores by the process of meiosis. The haploid spores germinate to form the gametophyte. Gametophyte bear sex organ which produce the male and female gamete. The male gamete reaches the egg cell with the help of water and undergoes fertilisation, to form the diploid zygote. The zygote develops to form the sporophyte.