Banana is related to Fruit in same way as Chrysanthemum is related to :

The answer is flower.

A banana is a fruit, which is the seed-bearing structure in a flowering plant that develops from the ovary after fertilization. A chrysanthemum is a flower, which is the reproductive structure found in flowering plants. The flower is the part of the plant that produces the seeds.

The other options are incorrect because they are not the reproductive structures of flowering plants. A stem is the part of the plant that supports the leaves and flowers. A root is the part of the plant that anchors it in the ground and absorbs water and nutrients.