The correct option is C Vallisneria
When the pollination is carried out through the agency of water, it is known as hydrophily.
In epihydrophily, the pollen grains are transferred through the surface of water. It can be seen in plants that grow above the surface of water. E.g:- Vallisneria.
In hypohydrophily, the pollen grains are transferred under the surface of water. It can be seen in submerged plants. E.g:- Zostera
Nelumbium or lotus is pollinated by the agency of insects (entomophily).
Pollination is carried out through the agency of birds (ornithophily) in Bombax.