The correct option is C None of the above
A flower that possesses either stamens or carpels but not both are called as unisexual flowers. A plant may be unisexual possessing only male flowers or female flowers, or it may be monoecious with male and female reproductive organs borne in the same flower or in different unisexual flowers but on the same plant. Removal of stamens or anthers or killing the pollen of a flower without the female reproductive organ is known as emasculation. In bisexual flowers, emasculation is essential to prevent self-pollination. But in unsexual flower already there is only one either male or female then there is no need to emasculate the flower. Thus, the correct answer is option D.