Q.

Which of the following is the correct sequence of events of sexual reproduction in a flower

1 Pollination, fertilisation, seedling, embryo  
2 Seedling, embryo, fertilisation, pollination  
3 Pollination, fertilisation, embryo, seedling  
4 Embryo, seedling, pollination, fertilisation  

Ans.

(3)

The correct sequence of events are:
Pollination (transfer of pollen from stamen to stigma)
↓
Fertilisation (fusion of germ cells to form zygote)
↓
Embryo formation (zygote divides several times to form an embryo within the ovule)
↓
Seedling (ovule develops a tough coat and converts into a seed)