The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
An androecium is most flowers ' third whorl. It consists of masculine units of reproduction called stamens. A stamen is called a filament by a lengthy stalk. A microsporangia cluster called the anther is at the top of the filament.Stamen, a flower's male reproductive portion. The stamen comprises of a lengthy slender stalk, the filament, with a two-lobed anther at the tip, in all but a few existing angiosperms.