Choose the correct statements.

I. All subaerial modified stems show vegetative reproduction

II. All underground modified stems show storage of food materials in their axis.

III. None of the Aerial modified stems store food materials

IV. Sub-aerial modified stems store food materials.

All underground and subaerial modified stems show vegetative propagation. Bulb is the only underground modified stem that does not store food materials in its axis. Sub-aerial modified stems do not store food materials. Only a few aerial modified stems like bulbils store food materials.