Here's why:
* Species diversity: India is home to a large number of big cat species, including tigers, lions, leopards, snow leopards, and clouded leopards.
* Tiger population: India has the largest wild tiger population in the world.
* Protected areas: India has a robust system of national parks and wildlife sanctuaries dedicated to protecting its big cat populations.
However, other countries like Africa (especially Tanzania, Kenya, and South Africa) have incredibly high numbers of lions and leopards, while Russia boasts a large population of Amur leopards and Siberian tigers.
Ultimately, the "most popular" country for big cats depends on your definition of "popular" and the specific big cat species you're interested in.