The Indus river, one of the longest rivers in Asia, originates in Tibet. Tibet is located in the southwestern part of China and is often referred to as the "Roof of the World" due to its high elevation. The river starts its journey from the Tibetan plateau, specifically from the vicinity of Lake Mansarovar in western Tibet.

Option 1 - Kinnaur: Kinnaur is a district in the Indian state of Himachal Pradesh. While there are multiple rivers that flow through Kinnaur, the Indus river does not originate from this region.

Option 2 - Ladakh: Ladakh is a region in the Indian state of Jammu and Kashmir. It is located in the northernmost part of India and shares its border with Tibet. While the Indus river runs through Ladakh, it does not originate from this region.

Option 3 - Nepal: Nepal is a landlocked country in South Asia, located mainly in the Himalayas. Though Nepal does have rivers like the Koshi, Gandaki, and Karnali, the Indus river does not originate in Nepal.

Alert - correct answer should be option 4: Tibet

Option 4 - Tibet: As mentioned earlier, the Indus river originates in Tibet, specifically from