What type of pollination takes place in $Vallisneria$?

  • A
    Pollination occurs in submerged condition by water.
  • B
    Flowers emerge above surface of water,and pollination occurs by insects.
  • C
    Flowers emerge above water surface,and pollen is carried by wind.
  • D
    Male flowers are carried by water currents to female flowers at surface of water.

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