Pollination by bats is called chiropterophily.

Explanation:

Pollination is the process by which pollen grains are transferred from the anther (male part) of a flower to the stigma (female part) of the same or another flower. This transfer of pollen can be done by various agents such as wind, water, insects, birds, bats, etc.

Bat-pollinated flowers are found in many tropical and subtropical regions of the world. These flowers often have a strong, fruity, or musky odor, which attracts bats. The flowers are usually large, white or pale-colored, and have a sturdy, bell-shaped structure that can support the weight of the bat.

The process of pollination by bats is called chiropterophily. The word chiroptero means "hand-wing" in Greek, referring to the hand-like structure of a bat's wing. Bat-pollinated flowers have adaptations to attract bats, such as large amounts of nectar and pollen, and a shape that allows the bat's head to come in contact with the reproductive structures of the flower.

Unlike other pollinators, bats are nocturnal and have a highly developed sense of smell and echolocation. They are able to fly long distances and can visit multiple flowers in a single night, making them important pollinators for many plant species.

In conclusion, pollination by bats is called chiropterophily, and it is an important process for many plant species in tropical and subtropical regions of the world.

Option b is right..
Anemophily.. By wind pollination
Hydrophiliy.. By water
Ornithophily.. By birds
Pollination by bats is.. chiropterophily.