Explanations:Metropolitan cities are large urban areas that serve as significant centers of economic, political, and cultural activity. In India, several cities are recognized as metropolitan cities due to their substantial population, economic importance, and administrative functions. The term "metropolitan" is often used to describe cities that have a population exceeding a certain threshold, typically over 4 million, and that play a crucial role in the national or regional economy.
Chennai, Delhi, and Kolkata are all recognized as metropolitan cities in India. Each of these cities has a population exceeding the threshold for metropolitan status and plays a significant role in the country's economic, political, and cultural landscape. Chennai, located in the southern part of India, is a major industrial and commercial center. Delhi, the capital of India, is the political and administrative hub of the country. Kolkata, in the eastern part of India, is known for its rich cultural heritage and is a major economic center in the region.
These cities are not only large in terms of population but also have well-developed infrastructure, including transportation networks, educational institutions, and healthcare facilities. They are also centers of innovation and technology, with a significant presence of multinational corporations and startups. The metropolitan status of these cities is further reinforced by their role in shaping national policies and their influence on the country's economic growth.
It is important to note that the criteria for classifying a city as metropolitan can vary. While population size is a key factor, other factors such as economic output, administrative functions, and cultural significance also play a role. In the context of this question, all the cities listed—Chennai, Delhi, and Kolkata—are recognized as metropolitan cities, making option D the correct answer.