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Both, autogamy and geitonogamy are prevented in
A
Maize
B
Papaya
C
Cucumber
D
Castor
Detailed Solution
Papaya is dioecious: male and female flowers are on different plants.
So neither autogamy (same flower) nor geitonogamy (another flower of the same plant) is possible.
Maize, cucumber and castor are monoecious; this prevents autogamy but not geitonogamy.
So neither autogamy (same flower) nor geitonogamy (another flower of the same plant) is possible.
Maize, cucumber and castor are monoecious; this prevents autogamy but not geitonogamy.