Correct option is C
Ans.(c)
Pollen grains must be light and non-sticky in order to be transported in wind currents during wind pollination. They frequently have exposed stamens
(allowing pollen to be easily dispersed in wind currents) and a large, often feathery stigma to trap pollen grains in the air. Wind-pollinated flowers
typically have a single ovule in each ovary and a dense inflorescence of flowers.