The correct option is A Cleistogamous flowers of common pansy
Autogamy or self pollination is the process of pollination where the pollen from an anther of a flower is transferred to the stigma of the same flower or of a different flower in the same plant. Cleistogamous flowers of Viola (comman pansy) do not open on maturity. So pollination happens within the same flower. So, it exhibits autogamy.