India is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world.
Nepal, officially Federal Democratic Republic of Nepal, is a landlocked country in South Asia. It is located mainly in the Himalayas, but also includes parts of the Indo-Gangetic Plain. With an estimated population of 26.4 million, it is 48th largest country by population and 93rd largest country by area.
Bhutan, a Buddhist kingdom on the Himalayas’ eastern edge, is known for its monasteries, fortresses (or dzongs) and dramatic landscapes that range from subtropical plains to steep mountains and valleys.
Sri Lanka, officially the Democratic Socialist Republic of Sri Lanka, is an island country in South Asia, located in the Indian Ocean to the southwest of the Bay of Bengal and to the southeast of the Arabian Sea.