The correct option is D Chiropterophily
The features of a flower such as its size, shape, color, smell, presence of nectar and its composition as well as the time of flowering are in response to various pollen vectors. Pollination of flowers can take place either abiotically or biotically. Biotic pollinations involve bee, birds, butterfly, moth, bat, beetle. Flowers which are large and showy often bell shaped and nocturnal (ones that open at night) generally emit a strong fruity odors with copious nectar are adaptations that help in pollination by bats (chiropterophily).