A, French fries are rich in starch, fried dough sticks are rich in fat, and protein and iron are less. A is wrong.

B, liver and milk are rich in protein and iron. Eating more can prevent anemia. B is right.

C vegetables and fruits are rich in vitamin c, which can prevent scurvy.

D. Fat meat and peanuts are rich in fat. D is wrong.

So choose: B.