How many of the following plants are pollinated by wind?
$Vallisneria$,$Eichhornia$ (Water Hyacinth),$Hydrilla$,Water Lily

Self-pollination which involves two different flowers 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.

Identify the wind-pollinated plant.

What is indicated by $A$ and $B$ in the given diagram?

Pollination in Ophrys (a Mediterranean orchid) occurs by