Concept:The Flamingo City is a famous breeding site for flamingos located in the Kutch region of Gujarat.Explanation:This site was named by ornithologist Salim Ali in 1945 after he observed a large number of lesser and greater flamingos breeding there. It lies within the Kutch National Wildlife Sanctuary, also known as the Rann of Kutch. This area is the only regular breeding ground for flamingos in India. Other options like Ladakh, Sundarbans, and Nainital are not known for flamingo breeding.Answer:A. Kutch-Rann