How many of the following statement (s) is /are correct about pollination?
I: In Vallisneria and Zostera, the flowers emerge above the level of water and are pollinated by insects or wind.
II : In most of the water pollinated species, pollen grains are protected from wetting by a mucilaginous covering.
III : Pollination by water is quite rare in flowering plants and is limited to about 30 genera, mostly dicotyledons.
In hydrophylous plants like Vallisneria and Zostera, the flowers are not brought above the level of water.