Continued self-pollination results in....

For a monoecious plant,which of the following is true?

In which of the following plants does autogamy not occur?

Flowers preventing self-pollination is called

Given below are two statements:
Statement $I$: In heteromorphic flowers,pollen grains produced from anther pollinate stigmas produced at same level.
Statement $II$: In Tobacco,the germination of pollen on the stigma of the same flower is inhibited.
In the light of above statements,select the correct option given below:

Which one of the following characteristics promotes cross-pollination?