The correct option is B Eichhornia
Eichhornia is a hydrophyte. Hydrophytes grow partially or completely submerged in water. They have no extensive vascular tissues, poorly developed mesophyll, few xylem and other support cells and reduced root systems. The roots have larger airspaces around the cells to facilitate diffusion of substances that are needed and to aid buoyancy. These are known as root pockets which are similar to root caps in land plants.
Thus, the correct answer is option B.