The diagram shows part of a flower. In which part does fertilisation take place, and where are the ovules and pollen grains located?
- Afertilisation occurs here: 1; ovules are found here: 2; pollen grains are found here: 4
- Bfertilisation occurs here: 2; ovules are found here: 3; pollen grains are found here: 4
- Cfertilisation occurs here: 3; ovules are found here: 3; pollen grains are found here: 1
- Dfertilisation occurs here: 4; ovules are found here: 1; pollen grains are found here: 2