In knol-rabi, fleshy edible part is the enlargement of

Solution (By Examveda Team)

In knol-rabi, the fleshy edible part is the enlargement of the stem.
Khol Rabi which is the german name for cabbage turnip resembles an above-ground turnip. It is also called knol-knol. The fleshy edible proration is an enlargement of the stem, which develops entirely above ground and is used as a vegetable.