Pick up the incorrect pair.
Pistia-stolon
The given options are the pairs of plant and its vegetative propagule.
Agave is a genus of monocots native to the hot and arid regions. It reproduces by sexual as well as asexual methods. The agave root system consists of a network of shallow rhizomes. In addition to growing from seeds, most agaves produce 'pups' – young plants from runners.
All grasses reproduce asexually bu runners.
A bulb is structurally a short stem with fleshy leaves or leaf bases. Plants like onion, garlic etc reproduce by means of bulbs.
Pistia is a genus of aquatic plant, commonly called as water cabbage, water lettuce, Nile cabbage, or shellflower. The plant can also undergo asexual reproduction. Mother and daughter plants are connected by a short stolon, forming dense mats.