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(B) Pollination is the transfer of pollen grains from the anther to the stigma of a flower.$1$. Autogamy involves the transfer of pollen grains from t

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Xenogamy

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(B) Pollination is the transfer of pollen grains from the anther to the stigma of a flower.$1$. Autogamy involves the transfer of pollen grains from the anther to the stigma of the same flower.$2$. Geitonogamy involves the transfer of pollen grains from the anther to the stigma of another flower of the same plant. Genetically,it is similar to autogamy because the pollen grains come from the same plant.$3$. Xenogamy involves the transfer of pollen grains from the anther to the stigma of a different plant. This brings genetically different types of pollen grains to the stigma.Therefore,the correct answer is $B$.

This is the only type of pollination which during pollination brings genetically different types of pollen grains to the stigma.

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