The correct option is D Smut of bajra
In India, smut of bajra (soil borne disease) is present in most of the
states where pearl millet (bajra) is cultivated. In this
disease, ovaries are converted into structures called sori (singular
sorus). The sori are larger than grains and appear as enlarged, oval to
conical bodies projecting somewhat beyond the glumes in place of grains.
The major limitations to chemical control of smut in pearl millet
are low monetary value of the crop, and scarcity of resources available
to pearl millet growing farmers. So, the correct answer is 'Smut of bajra'.