Answer : 3. "Finland"
Explanation :

According to the World Happiness Report 2024, the European country Finland is the happiest country in the world. Finland remains the happiest country in the world for the seventh consecutive year. Like last year, India remains at 126th position in the World Happiness Index. Whereas India's neighboring country Pakistan is at 108th place and Sri Lanka is at 128th place. America is at 23rd place.