A fodder plant is
Medicago sativa, commonly known as Alfalfa is a perennial flowering plant belonging to the family Fabaceae. It is cultivated as an important fodder plant in many countries around the world.
Melilotus indicus is a yellow-flowered herb native to northern Africa, Europe and Asia. It is an annual and perennial herb. It is used as a source of nectar, fodder and soil improver.
Trifolium alexandrinum, commonly known as Egyptian clover or Berseen clover is an annual clover cultivated mostly in irrigated subtropical regions. It is used as fodder mainly for cattle and milk buffalo.
So, the correct answer is 'All of the above'.