The name for the uppermost part of the gynoecium that serves as a device to trap pollen stigma.
Option B is correct
The gynoecium is the female reproductive organ in a flower, consisting of the carpels (containing the ovule) and the style. The stigma is the uppermost part of the style, often sticky or feathery, and its primary function is to receive pollen grains.
The ovary is located below the style and contains the ovules, which develop into seeds after fertilization. The style connects the stigma to the ovary and allows for pollen tube growth towards the ovule. The endocarp is the innermost layer of the fruit wall, not involved in pollen capture.