The correct answer is: a) Rice.
Rice is the main staple crop cultivated in Manipur. It is grown in both the valley and the hills. The valley is suitable for wet rice cultivation, while the hills are suitable for dry rice cultivation. Rice is the main source of food for the people of Manipur. It is also used to make a variety of dishes, such as rice cakes, rice pudding, and rice wine.
Maize is a cereal grain that is grown in many parts of the world. It is a major source of food for people in many developing countries. Maize is also used to make a variety of products, such as cornmeal, corn flour, corn oil, and corn syrup.
Wheat is a cereal grain that is grown in many parts of the world. It is a major source of food for people in many developed countries. Wheat is also used to make a variety of products, such as bread, pasta, and cereal.
Millet is a cereal grain that is grown in many parts of the world. It is a major source of food for people in many developing countries. Millet is also used to make a variety of products, such as millet flour, millet porridge, and millet beer.