Which of the following are reproductive parts of a flower?

The reproductive parts of a flower are stamens (male) and carpels (female). Stamens (collectively called androecium) produce pollen grains containing male gametes, while carpels (collectively called gynoecium) contain ovules with female gametes. These structures are directly involved in sexual reproduction - pollination, fertilization, and seed formation. Sepals and petals (which make up calyx and corolla) are non-reproductive, accessory parts that protect the bud and attract pollinators respectively. Flowers can exist without sepals and petals (as in grasses), but cannot function in sexual reproduction without stamens and/or carpels.