The correct answer is A. East Champaran.
Barley is a major cereal crop in Bihar. It is grown in all the districts of the state, but East Champaran is the leading producer. In 2019-20, East Champaran produced 1.2 million tonnes of barley, followed by Muzaffarpur (0.9 million tonnes) and Vaishali (0.8 million tonnes). Patna is not a major producer of barley.
Barley is a hardy crop that can be grown in a variety of soils and climates. It is a good source of carbohydrates, protein, and fiber. It is also used to make malt, which is used in brewing beer and whisky.
The main reason for East Champaran’s dominance in barley production is its favorable climate. The district has a long growing season and receives adequate rainfall. The soil in East Champaran is also well-suited for barley cultivation.
The government of Bihar has been promoting barley cultivation in the state. It has provided subsidies to farmers for the purchase of seeds and fertilizers. It has also set up barley processing plants in the state.
Barley production in Bihar is expected to increase in the coming years. The government is planning to increase the area under barley cultivation and to improve the productivity of the crop.