Answer : 2. "Bhutan"
Explanation :

World Aquatics and Bhutan Aquatics Federation have inaugurated Bhutan's first competition swimming pool in Thimphu through the Pool for All Programme. Situated at an altitude of 8200 feet, this facility is the highest swimming pool in the world. Launched in 2019, the initiative aims to provide top-class aquatic facilities globally while promoting aquatic sports. The new pool is an important milestone for Bhutanese aquatic sports development.