The correct option is A androecium and gynoecium
Four whorls of the flower are:
- Calyx
- Corolla
- Androecium
- Gynoecium
Androecium is composed of stamen and it represents the male reproductive part of the flower. It consists of two parts i.e., anther and filament. Gynoecium is composed of carpel and it represents the female reproductive part of the flower. It consists of stigma, style and ovary.