Step 1: What a legume fodder is.
A legume fodder belongs to the bean family. Its roots fix nitrogen from the air, and it gives protein-rich feed for animals.
Step 2: Check the choices.
Berseem is a clover and a true legume fodder grown in winter. Oats and maize are grasses, and sugarcane is a cash crop, so they are not legumes.
Step 3: Final pick.
The legume fodder here is berseem.
\[ \boxed{\text{Berseem}} \]