Development OF Male Gametophyte (Pre Pollination and Post Pollination Development)

Development of male gametophyte is:

Differentiate between self pollination and cross pollination .

Difference Between Self Pollination And Cross Pollination

Which of the following is not a post pollination development?

The development of male gametophyte in angiosperms is

Assertion :- Development of pollen grains begins only after pollination. Reason : Development of pollen grain takes place only on stigma