both autogamy and geitonomy are prevented in
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Answer is papaya,date palm e.t.c
Papaya ,date palm e.t.c are dioecious plants.That is both male and female flowers are present in different plants.So autogamy (i.e self-pollination)is prevented and gietonomy (i.e self -pollination on the same plant but different flowers) is prevented.
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