The term 'WORLD'S MOST POPULOUS DEMOCRACY' refers to India, which is a country located in South Asia. It is the world's second-most populous country with over 1.3 billion people and is the world's largest democracy. India is a federal republic governed under a parliamentary system and consists of 29 states and 7 union territories. It is also one of the most diverse countries in the world, with many different religions, languages, and cultures.