Concept: Ginger is a stemless herb that reproduces vegetatively through its underground stem.
Explanation:Ginger does not produce viable seeds for commercial planting.
Its underground stem is a rhizome, which has buds capable of growing into new plants.
Farmers cut the rhizome into smaller portions called seed rhizomes and plant them.
Each portion with a bud develops into a new ginger plant.
So, the vegetative propagation of ginger is by rhizomes, not suckers, true seeds, or tubers.
Answer: B. rhizomes