Concept:Ginger is a herbaceous crop that is propagated vegetatively using an underground modified stem.
Explanation:Ginger is not commonly grown from true seeds under normal farming conditions.
Instead, farmers use portions of its swollen, fleshy underground stem for planting.
This modified stem is known as a rhizome.
A rhizome grows horizontally beneath the soil surface.
It has nodes and buds that can give rise to new shoots and roots.
When a piece of the rhizome is planted, it develops into a new ginger plant.
This method of propagation is asexual or vegetative reproduction.
Other vegetative structures like bulbs, corms, and true seeds do not apply to ginger.
Answer:C. rhizome