A) male and female flowers are borne by different plants
B) autogamy is prevented but not geitonogamy
C) the anthers and stigma are placed at different positions to encourage cross pollination
D) both autogamy and geitonogamy are prevented
Correct Answer: B
Solution :
: In maize and castor plant, unisexual flowers are present, though both male and female flowers can be present on same plant. This prevents autogamy but not geitonogamy.
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