Choose the correct statement from the following:
a. Cleistogamous flowers always exhibit autogamy
b. Chasmogamous flowers always exhibit geitonogamy
c. Cleistogamous flowers exhibit both autogamy and geitonogamy
d. Chasmogamous flowers never exhibit autogamy
The answer is the option (a) Cleistogamous flowers always exhibit autogamy
Cleistogamous flowers do not open at all, and thus entry of pollens from another flower is not possible. Hence, cleistogamous flowers exhibit autogamy.