The correct answer is A. Rice.
Rice is the main cereal crop of Bihar. It is grown in almost all parts of the state, but the major rice-growing areas are the Gangetic plain and the plateau region. The state produces about 10 million tonnes of rice annually, which is about 10% of the country’s total production.
Maize is the second most important cereal crop of Bihar. It is grown in the dry areas of the state, especially in the plateau region. The state produces about 4 million tonnes of maize annually.
Wheat is the third most important cereal crop of Bihar. It is grown in the cold areas of the state, especially in the Himalayas. The state produces about 2 million tonnes of wheat annually.
Ragi is a minor cereal crop of Bihar. It is grown in the hilly areas of the state. The state produces about 1 million tonnes of ragi annually.
Rice is a staple food in Bihar. It is used to make a variety of dishes, such as rice pudding, rice cakes, and rice flour. Maize is used to make a variety of dishes, such as cornbread, corn tortillas, and corn chips. Wheat is used to make a variety of dishes, such as bread, pasta, and noodles. Ragi is used to make a variety of dishes, such as ragi porridge, ragi pancakes, and ragi roti.