The correct option is D Brassica nigra
The scientific name of black mustard is Brassica nigra. It is an annual plant cultivated for its black or dark brown seeds, which are commonly used as a spice.
Brassica may be a genus of plants within the Cruciferae Brassicaceae. The members of the genus could also be collectively known either as cabbages mustards Crops from this genus are sometimes called cole crops from the Latin caulis or stem or cabbage.
Species black mustard by W.D.J. Koch which is also referred to as Brassica nigra .
Black mustard is cultivated for its seeds, the source of the economic table- mustard, used as a condiment and medicine.