In vallisneria pollination occurs through water ,fr salvia is Entomophilous,and bottle brush is Ornithophilous.
hence coconut is correct since pollination in that takes place through wind

Anemophily is a type of pollination that involves the transfer of pollen grains from the male reproductive structures of a plant to the female reproductive structures by the wind. This type of pollination is found in plants that produce lightweight pollen grains that are easily carried by the wind to the female reproductive structures of other plants.Out of the options given, the plants that exhibit anemophily are Vallisneria, Salvia, and Bottle brush. Coconut, on the other hand, is pollinated by insects and not by the wind.Vallisneria is an aquatic plant that relies on water currents to transport its pollen from the male to the female flowers. The male flowers of Vallisneria break off from the plant and float to the surface of the water, where they release their pollen grains. The female flowers of Vallisneria have long, ribbon-like stigmas that float on the surface of the water and catch the pollen grains.Salvia is a genus of flowering plants that includes many species that exhibit anemophily. The flowers of Salvia have a tubular shape that allows the wind to easily carry their lightweight pollen grains from the male to the female reproductive structures.Bottle brush is a common name given to plants belonging to the genus Callistemon, which are native to Australia. The flowers of Callistemon are cylindrical and have many long, bristly stamens that resemble the bristles of a bottle brush. The anthers of the stamens release their pollen grains into the air, where they are carried by the wind to the female reproductive structures.In conclusion, anemophily is a type of pollination that is found in plants that produce lightweight pollen grains that are easily carried by the wind. Vallisneria, Salvia, and Bottle brush are examples of plants that exhibit anemophily. Coconut, on the other hand, is pollinated by insects and not by the wind.