A) Ripening of androecium earlier to gynoecium
B) Pollen grains of one flower reaching the stigma of another flower present on the same plant
C) Pollen grains of one flower, reaching the stigma of another flower present on a different plant of the same species
D) The inability of pollen to germinate on the stigma of the same flower
Correct Answer: C
Solution :
Transfer of pollen grains to the stigma of another flower is known as cross-pollination. It is further classified depending on whether the pollination has occured between two flowers on the same plant, ie, geitonogamy or between two flowers on different plants, ie, xenogamy.
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