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An Intiative by Sri Chaitanya
a
Castor
b
Maize
c
Commelina
d
Papaya
answer is D.
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Detailed Solution
Papaya is dioecious plant and hence does not show autogamy and geitonogamy but shows only xenogamy. Maize and Castor are monoecious plants which do not show autogamy but show both geitonogamy and xenogamy. Commelina has bisexual cleistogamous and chasmogamous flowers and show autogamy, geitonogamy and xenogamy.