The correct option is B Stamen
The microsporophyll of Cycas represents a stamen. Each microsporophyll (equivalent to stamen of angiosperm) is hard, leafy triangular and bears a number (700 to 1160) of microsporangia (pollen sac) on lower (abaxial) side. Male plants in Cycas produce male cones, which are clusters of microsporophylls, each bearing microsporangia, containing microspores (pollen).