The correct answer is: b) Wheat
Wheat has replaced a significant portion of the cotton-growing area in Punjab because it is a more profitable crop. Wheat is also a more water-efficient crop than cotton, which is important in a region that is facing water scarcity.
Maize is a cereal grain that is used to make a variety of products, including cornbread, tortillas, and popcorn. It is a relatively drought-tolerant crop, but it is not as profitable as wheat.
Rice is a cereal grain that is used to make a variety of products, including rice cakes, sushi, and risotto. It is a water-intensive crop, and it is not as profitable as wheat in Punjab.
Sugarcane is a grass that is used to make sugar. It is a water-intensive crop, and it is not as profitable as wheat in Punjab.