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Which of the following flower contains either pistil or stamen?

A flower that contains either female or male reproductive organs is called a Unisexual flower.

Unisexual flowers can be either male (staminate) or female (pistillate). Male flowers have one or more stamens, which are the male reproductive organs that produce pollen but lack a pistil. Female flowers have one or more pistils, which are the female reproductive organs that produce ovules and receive pollen, but lack stamens. Some plants have separate male and female flowers on the same individual (monoecious), while others have male and female flowers on separate individuals (dioecious).