Which among the following option is associated with the stamen?

Anther, filament, microsporangium, pollen grains.

The stamen is the male reproductive part of a flower and is composed of several components. The anther is the top part of the stamen that contains the microsporangia (pollen sacs), where pollen grains are produced. The filament is the slender stalk that supports the anther. Additionally, the microsporangium refers to the structure within the anther where microspores (which develop into pollen grains) are formed. Lastly, the pollen grains themselves are produced within the microsporangium and play a vital role in pollination and fertilization.

The other options are not associated with the stamen. The ovule is the female reproductive organ of a flower.  The style is the stalk that supports the stigma. The stigma is the sticky part of the pistil that receives the pollen grains.