The correct answer is D. All of the above.
Rapeseed and mustard are the most important oilseeds in Bihar, followed by linseed and sesame. Rapeseed and mustard are grown in the northern and eastern parts of the state, while linseed and sesame are grown in the southern and western parts.
Rapeseed is a major source of edible oil in India. It is also used to produce biodiesel and other industrial products. Mustard is another important source of edible oil in India. It is also used to produce mustard oil cake, which is a valuable fertilizer.
Linseed is a major source of linseed oil, which is used in paints, varnishes, and other industrial products. Sesame is a major source of sesame oil, which is used in cooking and cosmetics.
All of these oilseeds are important for the economy of Bihar. They provide employment to a large number of people and contribute to the state’s export earnings.