The correct answer is (a) Mustard.
Varuna is a variety of mustard. It is a winter annual plant that is grown for its edible seeds. The seeds are used to make mustard oil, which is used in cooking and as a preservative. The leaves are also edible and can be used in salads or cooked.
Mustard is a member of the Brassicaceae family, which also includes cabbage, broccoli, and cauliflower. It is native to Europe and Asia, but it is now grown in many parts of the world.
Mustard seeds are small, round, and yellow, brown, or black. They have a strong, pungent flavor. The seeds are used to make mustard powder, which is used in sauces, dressings, and marinades. They are also used to make mustard oil, which is used in cooking and as a preservative.
The leaves of mustard plants are dark green and have a slightly bitter taste. They can be used in salads or cooked. Mustard greens are a good source of vitamins A and C.
Mustard is a versatile plant that can be used in many different ways. It is a good source of nutrients and has a strong, flavorful taste.
The other options are incorrect because they are not varieties of mustard.
(b) Linseed is a variety of flax. It is a herbaceous annual plant that is grown for its oil-rich seeds. The seeds are used to make linseed oil, which is used in paints, varnishes, and linoleum. The leaves are also edible and can be used in salads or cooked.
(c) Sunflower is a variety of Helianthus. It is an annual plant that is grown for its edible seeds. The seeds are used to make sunflower oil, which is used in cooking and as a salad dressing. The leaves are also edible and can be used in salads or cooked.
(d) Sesame is a variety of Sesamum. It is an annual plant that is grown for its edible seeds. The seeds are used to make sesame oil, which is used in cooking and as a salad dressing. The seeds are also used to make tahini, which is a paste made from ground sesame seeds.