The correct option is B Geitonogamy
Geitonogamy is a type of self-pollination in which the pollen from anthers of one flower is transferred to the stigma of another flower of the same plant. Pollination occurs in the same flower of a plant is called Autogamy. It is also a type of self-pollination. Xenogamy and Allogamy are the same things and type of cross-pollination in which pollen grains from the flower of one plant transfer to the stigma of the flower of another plant. Hence, the correct option is B.