The terminal part of the carpel in a flower, which may be sticky is ________

The correct answer is C. Stigma.

The stigma is the sticky part of the carpel in a flower. It is located at the top of the style and is where pollen grains land when they are transferred from the anther of another flower. The stigma is usually sticky to help ensure that pollen grains adhere to it. Once a pollen grain has landed on the stigma, it germinates and grows a pollen tube down the style to the ovary. The pollen tube delivers sperm cells to the ovules in the ovary, where fertilization takes place.

The other options are incorrect.

• The ovary is the lower part of the carpel. It contains the ovules, which are the female reproductive structures of the flower.
• The style is the stalk that connects the stigma to the ovary.
• The anther is the male reproductive structure of the flower. It contains the pollen grains.