Which of the following statements is not correct ?

• A

  Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil.

• B

  Some reptiles have also been reported as pollinators in some plant species.

• C

  Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style.

• D

  Insects that consume pollen or nectar without bringing about pollination are called pollen/ nectar robbers.