India is a country in South Asia the second-most populated country with over 1.2 billion people, it has some cities but the best known cities are Kolkata, Mumbai and Delhi. I going to talk about Delhi. The city proper's population is over 11 million, the second-highest in India after Mumbai. Delhi is the most polluted city in the world and is the largest city in terms of area in the country, The President of India lives in New Delhi too.Delhi is also is the largest commercial centre in northern India.