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Which of the following is the **only** type of pollination that brings genetically different pollen grains to the stigma?
AAutogamy
BGeitonogamy
CCleistogamy
DXenogamy
Answer & Solution
Correct answer: D. Xenogamy
Only **xenogamy** (pollination between different plants) introduces *genetically different* pollen — it is the only true cross-pollination at the genetic level.
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