The correct answer is: A. Greater flamingo
The greater flamingo is a large, long-legged wading bird with a long neck and a deep red or pink plumage. It is the most common flamingo species in the world, and it is found in a variety of habitats, including wetlands, lakes, and coastal areas. The greater flamingo is a social bird, and it often forms large flocks. It is an omnivore, and its diet consists of algae, crustaceans, and small fish.
The black-crested bulbul is a small songbird with a black crest and a white throat. It is found in forests and woodlands in India and Sri Lanka. The black-crested bulbul is a social bird, and it often forms flocks of up to 20 birds. It is an insectivore, and its diet consists of insects, spiders, and other small invertebrates.
The house sparrow is a small passerine bird that is found in urban and suburban areas around the world. It is a member of the sparrow family Passeridae, and it is the most common bird in the world. The house sparrow is a social bird, and it often forms flocks of up to 100 birds. It is an omnivore, and its diet consists of seeds, insects, and other small invertebrates.
None of these options are the state bird of Gujarat. The state bird of Gujarat is the greater flamingo.