When pollen of a flower is transferred to the stigma of another flower of the same plant, the pollination is referred to as

The correct option is A

geitonogamy

The correct option is option A.

Explanation of the correct option:

Pollination :

1. The mechanism of transferring pollen grains from the anther of one flower to the stigma of another flower of the same or different plant is called pollination.
2. The pollen grains can be transferred to the stigma of the flower through wind, water and insects called pollinating agents.
3. Pollination can be divided into three types depending upon the source of pollen grains.

Geitonogamy :

1. The transfer of pollen grains from the anther of one flower to the stigma of another flower of the same plant is called Geitonogamy.
2. Functionally geitonogamy is called cross-pollination but genetically it is referred to as self-pollination because the pollen grains of the same plant are transferred to the stigma of the same plant.

Explanation of the incorrect options:

Option B:

The transfer of pollen grains from the anther to the stigma of the same flower is called self-pollination or Autogamy.

Option C:

The pollination of one flower with the pollen of another plant is cross-pollination.

Option D:

The transfer of pollen grains from the anther of one plant to the stigma of a different plant is called xenogamy or cross-pollination.

Final answer: When pollen of a flower is transferred to the stigma of another flower of the same plant, the pollination is referred to as geitonogamy.