A vertically growing thick usually unbranched underground stem with more diameter than length is

In two plants A and B the first plant shows horizontally growing underground stem and the second plant shows vertically growing underground stem and both of them belong to the same family. A and B plants respectively are

Thick underground stem growing parallel to soil surface is

Thick underground stem growing parallel to soil surface is

Thick underground stem growing parallel to soil surface is

A thick fleshy underground horizontal main stem is

A thick fleshy underground horizontal main stem is

A thick fleshy underground horizontal main stem is

A thick fleshy underground horizontal main stem is

……………………… is a horizontally growing underground stem.

Assertion : Asparagus can be vegetatively propagated by the stem. Reason : Aspargus has unbranched swollen, underground stem having circular nodes that have buds for growth of daughter plants.