What is true about cleistogamy?

Options

A. It occurs in unisexual flowers
B. It produces assured seed-set even in the absence of pollinators
C. it leads to introduction of new useful characters
D. It is a method of geitonogamy

Answer

B

Explanation

Cleistogamy is only possible in bisexual flowers. Since it is method of self -pollination. New useful characters are seldom introduced. Cleistogamy is a method of autogamy since the flower is pollinated by its own pollen. In geitonoamy pollen grains of one flower are transferred to the stigma of another flower belonging to either the same plant or genetically similar plant.