Which of the following is a post-fertilisation event in flowering plants?

Answer: (b) Embryo development

Events of sexual reproduction in flowering plants are grouped as:

• Pre-fertilisation: formation of flowers, formation of pollen grains (microsporogenesis) and of the embryo sac, and pollination (transfer of pollen grains).
• Fertilisation: fusion of male and female gametes (double fertilisation).
• Post-fertilisation: development of the endosperm and embryo, maturation of ovules into seeds and of the ovary into the fruit.

Only embryo development happens after fertilisation; the other three options are pre-fertilisation events.