Gynostegium (Fusion of anthers with stigma) and pollinia are present in family

Apocynaceae

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Asclepiadaceae

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Convolvulaceae

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Solanaceae or Cucurbitaceae

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Solution

The correct option is A Asclepiadaceae
In Apocynaceae, there are 5 androecium. Androecial members are adnate (epipetalous), united with the gynoecium and free of one another. Stamens are 5 in number; inserted near the base of the corolla tube. The gynoecium is syncarpous; superior, or partly inferior. Placentation when unilocular, with the two placentas, is parietal.
Therefore, the correct answer is option B.

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