In normal flower which opens and exposes the ______ and the stigma, complete autogamy is rare.AStigmaBNucellusCAntherDStyleAnswer: C. Anther Read Explanation: Anthers is abroad knob like fertile part of a stamen that produces and stores pollen grains. On dehiscence, that is the cracking open of anther sacs, the pollen grains fall off. Read more in App