Which one of the following usually does $NOT$ promote self-pollination?

Maturation of male and female sex organs at different times in a flower is called

Which of the following mechanisms prevents self-pollination?

Match the following columns regarding plant breeding systems and select the correct option:
Column-$I$: $(i)$ Monoecious, (ii) Dioecious
Column-$II$: $(p)$ Prevents both autogamy and geitonogamy, $(q)$ Prevents autogamy but not geitonogamy
Column-$III$: $(x)$ Papaya and Date palm, $(y)$ Castor and Maize

Continued self-pollination results in

In which of the following plants are both geitonogamy and autogamy prevented?