The answer is B. Mustard.
Bajra, rice, wheat, and barley are all cereal grains. They are all used as food for humans and animals, and they are all grown in similar climates. Mustard, on the other hand, is a member of the mustard family and is used as a spice. It is not a cereal grain.
Bajra is a type of millet that is grown in Africa and Asia. It is a staple food in many parts of the world, and it is used to make a variety of dishes, including porridge, bread, and beer.
Rice is a cereal grain that is grown in many parts of the world. It is the staple food for more than half of the world’s population, and it is used to make a variety of dishes, including rice cakes, sushi, and risotto.
Wheat is a cereal grain that is grown in many parts of the world. It is used to make a variety of products, including bread, pasta, and beer.
Barley is a cereal grain that is grown in many parts of the world. It is used to make a variety of products, including beer, malt, and animal feed.
Mustard is a member of the mustard family and is used as a spice. It is not a cereal grain. Mustard seeds are used to make mustard powder, mustard oil, and mustard sauce.