The transfer of pollen grains from the anther to the stigma of another flower of the same plant is called .....

Identify the set of correct statements:
$A$. The flowers of Vallisneria are colourful and produce nectar.
$B$. The flowers of water lily are not pollinated by water.
$C$. In most of water-pollinated species,the pollen grains are protected from wetting.
$D$. Pollen grains of some hydrophytes are long and ribbon like.
$E$. In some hydrophytes,the pollen grains are carried passively inside water.
Choose the correct answer from the options given below.

What type of pollination takes place in $Vallisneria$?

In how many genera is pollination by water observed?

Which of the following characteristics are typically observed in bird-pollinated flowers (ornithophily)?

Wind pollinated flowers are