The correct answer is: B) Alfalfa
Alfalfa is a perennial legume that is widely cultivated as a forage crop. It is a high-quality fodder that is high in protein and other nutrients. Alfalfa is also a good source of fiber, which can help to improve digestion in livestock.
Napier grass is a tropical grass that is also used as a forage crop. It is a fast-growing grass that can be harvested several times per year. Napier grass is a good source of energy, but it is not as high in protein as alfalfa.
Berseem is a legume that is grown in both tropical and temperate climates. It is a high-quality fodder that is high in protein and other nutrients. Berseem is also a good source of fiber, which can help to improve digestion in livestock.
Maize is a cereal grain that is not typically used as a forage crop. However, it can be used as a green forage crop when it is young and tender. Maize is a good source of energy, but it is not as high in protein as alfalfa or berseem.
In conclusion, alfalfa is the type of fodder that is widely cultivated in Karnataka. It is a high-quality fodder that is high in protein and other nutrients. Alfalfa is also a good source of fiber, which can help to improve digestion in livestock.