What happens if the wrong type of pollen grain lands on the stigma?

• A

  The pistil rejects the pollen by preventing pollen germination on the stigma or the pollen tube growth in the style.

• B

  The pistil does not have the ability to recognise the pollen, whether it is of the right type  or of the wrong type.

• C

  The pistil accepts the pollen and promotes post-pollination events that leads to fertilisation.

• D

  The pistil accepts the pollen which after germination is rejected by the synergids present in the embryo sac.